Perhaps you should try some spelling variations:
phan chuc » pham chuc, phan khuc, phan thuc
sach thue » sach thieu, sach tham, cach thuc
van hanh » van thanh, ban hanh, van anh
sach thu » sach thieu, sach tham, cach thuc
chuc van » chu van, chuc va, thuc van
lai cua » dai cua, hai cua, lai chau
vai cua » dai cua, hai cua, bai cua
hieu ve » hieu va, hieu van
ve phan » va phan, ke phan, ve phat
nang ma » tang ma, sang ma, nang cao
ma hoi » mai hoi, xa hoi, ma hoa

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) or (sach thue)) nang ma hoi. hieu ve phan chuc van hanh ((vai cua) or (lai cua)) te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so ((sach thu) OR (sach thue)) nang ma hoi. hieu ve phan chuc van hanh ((vai cua) OR (lai cua)) te.
• Adding a wildcard symbol may retrieve word variants: so ((sach thu) or (sach thue)) nang ma hoi. hieu ve phan chuc van hanh ((vai cua) or (lai cua)) te*.