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