Perhaps you should try some spelling variations:
thanh dai » thanh hai, thanh tai, thanh dat
bat thanh » ban thanh, bac thanh, dat thanh
su triet » su tien, ve triet
te sach » toc sach
suc bat » luc bat, duoc bat
van lam » van nam
sach ty » sach y, sach tu, sach thu
van cam » van nam, van cau, van dam
nang ma » tang ma, sang ma, nang cao
ty nang » ky nang, ty xang, ty hang
su viet » so viet
ma hoi » mai hoi, xa hoi, ma hoa

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) OR (su viet))~.
• 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) OR (su viet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty nang ma hoi. hieu ((van cam) or (van lam)) suc bat thanh dai ((su triet) OR (su viet))".
• 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) OR (su viet))*.