Perhaps you should try some spelling variations:
pham chuc » pham duc, pham huu, kham chua
sach thue » sach thieu, sach tham, cach thuc
hanh vai » hanh vi, hanh va, hanh tai
sach thu » sach thieu, sach tham, cach thuc
vai cua » dai cua, hai cua, lai cua
nang ma » tang ma, sang ma, nang cao
va hanh » van hanh, va thanh, va danh
hieu vi » hieu voi, hieu ve, hien vi
chuc va » thuc va, thuc vat
hieu va » lieu va, hieu qua
cua tu » cua tuc, cua su, cua cu
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: so ((sach thu) or (sach thue)) nang ma hoi. ((hieu vi) OR (hieu va)) pham chuc va hanh vai cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so ((sach thu) OR (sach thue)) nang ma hoi. ((hieu vi) OR (hieu va)) pham chuc va hanh vai cua tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so ((sach thu) or (sach thue)) nang ma hoi. ((hieu vi) OR (hieu va)) pham chuc va hanh vai cua tu".
• Adding a wildcard symbol may retrieve word variants: so ((sach thu) or (sach thue)) nang ma hoi. ((hieu vi) OR (hieu va)) pham chuc va hanh vai cua tu*.