Perhaps you should try some spelling variations:
sach thu » sach thue, sach thieu, sach tham
so sach » so sanh, bo sach, co sach
hanh va » hang va, hanh vi
va hanh » van hanh, va thanh, va danh
chuc va » thuc va, thuc vat
ve phan » va phan, ke phan, ve phat
nang ma » tang ma, nang cao, mang may
sang ma » tang ma, sang tao, mang may
v pham » vi pham, d pham
va cua » va chua, via cua, ca cua
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 phan) or (v pham)) chuc va hanh va 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 phan) OR (v pham)) chuc va hanh va cua te.
• Adding a wildcard symbol may retrieve word variants: so sach thu ((nang ma) or (sang ma)) hoi. hieu ((ve phan) or (v pham)) chuc va hanh va cua te*.