Perhaps you should try some spelling variations:
hanh vai » hanh vi, hanh va, hanh tai
sach thu » sach thue, sach thieu, sach tham
van pham » van phan, van phat, van tham
vai cua » dai cua, hai cua, lai cua
va hanh » van hanh, va thanh, va danh
chuc va » thuc va, thuc vat
co sach » bo sach, cuon sach, hoc sach
nang ma » tang ma, sang ma, mang may
cua tuc » cua duc, cua tu, cua thuoc

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

• Performing a fuzzy search may retrieve terms with similar spellings: co sach thu ((nang ma) or (nang cao)) hoi. hieu ((van pham) OR (san pham)) chuc va hanh vai cua tuc~.
• If you are trying to use Boolean operators, they must be ALL CAPS: co sach thu ((nang ma) OR (nang cao)) hoi. hieu ((van pham) OR (san pham)) chuc va hanh vai cua tuc.
• The words AND, OR and NOT may confuse the search; try adding quotes: "co sach thu ((nang ma) or (nang cao)) hoi. hieu ((van pham) OR (san pham)) chuc va hanh vai cua tuc".
• Adding a wildcard symbol may retrieve word variants: co sach thu ((nang ma) or (nang cao)) hoi. hieu ((van pham) OR (san pham)) chuc va hanh vai cua tuc*.