Perhaps you should try some spelling variations:
pham chuc » pham duc, pham huu, kham chua
sach thue » sach thu, sach thieu, sach tham
van hanh » van thanh, ban hanh, van anh
chuc van » chu van, chuc va, thuc van
bo sach » co sach, hoc sach
hai cua » thai cua, dai cua, hoi cua
vai cua » dai cua, lai cua, bai cua
ve pham » vi pham, v pham, ve phan
hieu ve » hieu va, hieu van
sang ma » tang ma, nang ma, sang tao

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: bo sach thue ((nang cao) or (sang ma)) hoi. hieu ve pham chuc van hanh ((vai cua) OR (hai cua)) te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: bo sach thue ((nang cao) OR (sang ma)) hoi. hieu ve pham chuc van hanh ((vai cua) OR (hai cua)) te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "bo sach thue ((nang cao) or (sang ma)) hoi. hieu ve pham chuc van hanh ((vai cua) OR (hai cua)) te".
• Adding a wildcard symbol may retrieve word variants: bo sach thue ((nang cao) or (sang ma)) hoi. hieu ve pham chuc van hanh ((vai cua) OR (hai cua)) te*.