Perhaps you should try some spelling variations:
pham chuc » pham duc, pham huu, kham chua
sach thu » sach thue, sach thieu, sach tham
hieu van » hieu va, thien van, lieu va
van pham » san pham, van phan, van phat
co sach » bo sach, cuon sach, hoc sach
nang ma » tang ma, sang ma, mang may
chuc va » thuc va, thuc vat
va hanh » van hanh, va thanh, va danh
hanh va » hang va, hanh vi
cua tuc » cua duc, cua tu, cua thuoc
va cua » va chua, via cua, ca cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: co sach thu ((nang ma) or (nang cao)) hoi. hieu van pham chuc va hanh va cua tuc~.
• If you are trying to use Boolean operators, they must be ALL CAPS: co sach thu ((nang ma) OR (nang cao)) hoi. hieu van pham chuc va hanh va cua tuc.
• Adding a wildcard symbol may retrieve word variants: co sach thu ((nang ma) or (nang cao)) hoi. hieu van pham chuc va hanh va cua tuc*.