Perhaps you should try some spelling variations:
thanh dai » thanh hai, thanh tai, thanh dat
su triet » su viet, su tien, ve triet
duoc bat » duoc ban, duoc dat, duoc chat
sach ty » sach y, sach tu, sach thu
suc bat » luc bat
te sach » toc sach
van lam » van nam
van cam » van nam, van cau, van dam
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang
dai su » dai sua, dai so, dan su

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ty nang xa hoi. hieu ((van cam) or (van lam)) ((suc bat) OR (duoc bat)) thanh dai su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty nang xa hoi. hieu ((van cam) OR (van lam)) ((suc bat) OR (duoc bat)) thanh dai su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty nang xa hoi. hieu ((van cam) or (van lam)) ((suc bat) OR (duoc bat)) thanh dai su triet".
• Adding a wildcard symbol may retrieve word variants: te sach ty nang xa hoi. hieu ((van cam) or (van lam)) ((suc bat) OR (duoc bat)) thanh dai su triet*.