Perhaps you should try some spelling variations:
hanh hai » thanh hai, nhanh hai, hang hai
sach thu » sach thue, sach thieu, sach tham
so sach » so sanh, bo sach, co sach
va phan » van phan, va phat, va phap
hai cua » thai cua, dai cua, hoi cua
va hanh » van hanh, va thanh, va danh
chuc va » thuc va, thuc vat
ve phan » ke phan, ve phat, vi phan
sang ma » tang ma, sang tao, mang may
nang ma » tang ma, nang cao, mang may
cua tu » cua tuc, cua su, cua cu

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 (va phan)) chuc va hanh hai cua tu~.
• 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 (va phan)) chuc va hanh hai cua tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach thu ((nang ma) or (sang ma)) hoi. hieu ((ve phan) OR (va phan)) chuc va hanh hai cua tu".
• Adding a wildcard symbol may retrieve word variants: so sach thu ((nang ma) or (sang ma)) hoi. hieu ((ve phan) OR (va phan)) chuc va hanh hai cua tu*.