Perhaps you should try some spelling variations:
pham chuc » pham duc, pham huu, kham chua
hanh dai » hanh tai, hanh dao, vanh dai
thi nang » thi cong, ki nang, thi hanh
hieu van » hieu va, thien van, lieu va
so sach » bo sach, co sach, hoc sach
so sanh » do sanh
cao hoi » cau hoi, co hoi, cao hoc
hieu ve » hieu va
va hanh » van hanh, va thanh, va danh
chuc va » thuc va, thuc vat
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) or (so sanh)) thi nang cao hoi. ((hieu ve) OR (hieu van)) pham chuc va hanh dai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sach) OR (so sanh)) thi nang cao hoi. ((hieu ve) OR (hieu van)) pham chuc va hanh dai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((so sach) or (so sanh)) thi nang cao hoi. ((hieu ve) OR (hieu van)) pham chuc va hanh dai cua te".
• Adding a wildcard symbol may retrieve word variants: ((so sach) or (so sanh)) thi nang cao hoi. ((hieu ve) OR (hieu van)) pham chuc va hanh dai cua te*.