Perhaps you should try some spelling variations:
pham chuc » pham duc, pham huu, kham chua
hanh lai » hanh lam, hanh tai, thanh lap
sach thu » sach thue, sach thieu, sach tham
so sach » so sanh, bo sach, co sach
chuc va » thuc va, thuc vat
nang ma » tang ma, sang ma, nang cao
lai cua » dai cua, hai cua, lai chau
hieu ve » hieu van
va hanh » van hanh, va thanh, va danh
hieu va » lieu va, hieu qua
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: so sach thu ((nang ma) or (mang may)) hoi. ((hieu ve) or (hieu va)) pham chuc va hanh lai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach thu ((nang ma) OR (mang may)) hoi. ((hieu ve) OR (hieu va)) pham chuc va hanh lai cua te.
• Adding a wildcard symbol may retrieve word variants: so sach thu ((nang ma) or (mang may)) hoi. ((hieu ve) or (hieu va)) pham chuc va hanh lai cua te*.