So far i have 3 single entry( 1st from embassy in my country),2nd in Cambodia and 3rd in Penang.Is it possible to get 4th single entry? ( in Laos/Cambodia)

Probably in Laos .

3 more in Vientiane, then 2 more in Penang, then maybe another two in Cambodia, then Bali, etc.

Should your passport get full change it and reset.

kind of unlimited if you switch embassies, but you may encounter problems with immigration down the line when trying to enter Thailand.......they're strict now...

Definitely OK for a couple of SETVs in Laos. It is not so definite that you would be OK in Phnom Penh. There have been reports that they look at total SETVs and not just ones issued there. I would guess they would issue you an SETV because you only have two outside your home country.

You should be ok getting another in Loas.

No problems in Vientiane.....I am on my 4th in a row from the same embassy.....

Thanks for answers guys.I'm probably gonna use Visa service like always(its about 5-6000 baht),it should be easier.Good thing to know that its actually possible to get 4th visa in a row

You should be fine this year.

3 more in Vientiane, then 2 more in Penang, then maybe another two in Cambodia, then Bali, etc.

Should your passport get full change it and reset.

And how does that work??

Do you really think that in the modern world that computers don't keep track of everyone?

Didn't you notice that the little facial recognition camera that the passport control guy at Swampy or Don M asked you too at look at was real?

Sure, change your passport.....nobody will notice.

In a country where Monks have smart phones.... the only dumb ones are foreigners.

3 more in Vientiane, then 2 more in Penang, then maybe another two in Cambodia, then Bali, etc.

Should your passport get full change it and reset.

And how does that work??

Do you really think that in the modern world that computers don't keep track of everyone?

Didn't you notice that the little facial recognition camera that the passport control guy at Swampy or Don M asked you too at look at was real?

Sure, change your passport.....nobody will notice.

In a country where Monks have smart phones.... the only dumb ones are foreigners.

When deciding whether to issue visas, the consensus is that consulates do not seem to consult the computers, but only look at the history of visas in your current passport. Some go so far as to say they cannot check back, which I think is incorrect. At the very least, with a fresh passport, your chance of getting visas from strict consulates is improved. Immigration officials on entry to Thailand, however, do have a complete record of your entries on their computer, and your old and new passports will usually be linked in their system.