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