Perhaps you should try some spelling variations:
nang tai » hang tai, tang tai, sang tai
hanh dai » hanh tai, hanh dao, vanh dai
thuc dan » thuc hanh, hoc dan, thuc vat
hieu loi » hieu moi, hien loi, hieu voi
thuc va » thuc vat, thuc day
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
hieu vi » hieu voi, hieu va, hieu ve
tai hoi » tai khoi, dai hoi, tai hai
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ky nang tai hoi. ((hieu vi) or (hieu loi)) tham ((thuc va) OR (thuc dan)) hanh dai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang tai hoi. ((hieu vi) OR (hieu loi)) tham ((thuc va) OR (thuc dan)) hanh dai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang tai hoi. ((hieu vi) or (hieu loi)) tham ((thuc va) OR (thuc dan)) hanh dai cua te".
• Adding a wildcard symbol may retrieve word variants: su sach ky nang tai hoi. ((hieu vi) or (hieu loi)) tham ((thuc va) OR (thuc dan)) hanh dai cua te*.