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