Perhaps you should try some spelling variations:
cau trung » cau truong, cac trung, cao trung
va triet » va thiet, va trien, ve triet
hanh vai » hanh vi, hanh va, hanh tai
trung ha » trung hoc, trung tam, trung cap
ha hanh » ha thanh, nha hanh, ha anh
hieu va » lieu va, hieu qua
so sach » bo sach, co sach, hoc sach
hieu ve » hieu van
nang xa » nang x, lang xa, nang ma
uu nang » cuu nang, vu nang, cuu nong
so sanh » do sanh
vai va » mai va, dai va, hai va

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)) uu nang xa hoi. ((hieu ve) or (hieu va)) cau trung ha hanh vai va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sach) OR (so sanh)) uu nang xa hoi. ((hieu ve) OR (hieu va)) cau trung ha hanh vai va triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((so sach) OR (so sanh)) uu nang xa hoi. ((hieu ve) or (hieu va)) cau trung ha hanh vai va triet*".