Perhaps you should try some spelling variations:
sach thu » sach thue, sach thieu, sach tham
hanh vai » hanh vi, hanh va, hanh tai
so sach » so sanh, bo sach, co sach
vai cua » dai cua, hai cua, lai cua
va hanh » van hanh, va thanh, va danh
chuc va » thuc va, thuc vat
ve pham » vi pham, ve phan, ve phat
sang ma » tang ma, sang tao, mang may
nang ma » tang ma, nang cao, mang may
v pham » vi pham, d pham
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 (sang ma)) hoi. hieu ((ve pham) or (v pham)) chuc va hanh vai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach thu ((nang ma) OR (sang ma)) hoi. hieu ((ve pham) OR (v pham)) chuc va hanh vai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach thu ((nang ma) OR (sang ma)) hoi. hieu ((ve pham) or (v pham)) chuc va hanh vai cua te".
• Adding a wildcard symbol may retrieve word variants: so sach thu ((nang ma) OR (sang ma)) hoi. hieu ((ve pham) or (v pham)) chuc va hanh vai cua te*.