Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hanh lai » hanh lam, hanh tai, thanh lap
toc sach » hoc sach, doc sach, thuoc sach
hieu vi » hieu voi, hieu va, hien vi
hieu ve » hieu va, hieu van
sach ky » sac ky, sach y, sach ty
thuc va » thuc dan, thuc day
nang ma » tang ma, sang ma, nang cao
lai cua » dai cua, hai cua, lai chau
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: toc sach ky nang ma hoi. ((hieu vi) or (hieu ve)) pham ((thuc va) OR (thuc vat)) hanh lai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ky nang ma hoi. ((hieu vi) OR (hieu ve)) pham ((thuc va) OR (thuc vat)) hanh lai cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ky nang ma hoi. ((hieu vi) or (hieu ve)) pham ((thuc va) OR (thuc vat)) hanh lai cua triet".
• Adding a wildcard symbol may retrieve word variants: toc sach ky nang ma hoi. ((hieu vi) or (hieu ve)) pham ((thuc va) OR (thuc vat)) hanh lai cua triet*.