Perhaps you should try some spelling variations:
bat thanh » ban thanh, bac thanh, dat thanh
thanh dai » thanh hai, thanh tai, thanh dat
su triet » su viet, su tien, ve triet
te sach » toc sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
nang ma » tang ma, sang ma, nang cao
van cam » van nam, van cau, van dam
van lam » van nam
suc bat » luc bat, duoc bat
ma hoi » mai hoi, xa hoi, ma hoa
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 ma hoi. hieu ((van cam) or (van lam)) suc bat thanh dai su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty nang ma hoi. hieu ((van cam) OR (van lam)) suc bat thanh dai su triet.
• Adding a wildcard symbol may retrieve word variants: te sach ty nang ma hoi. hieu ((van cam) or (van lam)) suc bat thanh dai su triet*.