Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
danh bat » doanh bat, anh bai, dinh ba
hieu van » hieu va, thien van, lieu va
tu cach » tu cac
cao hoi » cau hoi, co hoi, cao hoc
su sach » so sach, vu sach
van cam » van nam, van lam, van cau
xuc va » duc va, tuc va, xac va
luc va » duc va, tuc va, loc va
bat va » ban va, dat va, vat va

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu cach) or (su sach)) ky nang cao hoi. hieu van cam ((xuc va) OR (luc va)) danh bat va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cach) OR (su sach)) ky nang cao hoi. hieu van cam ((xuc va) OR (luc va)) danh bat va triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu cach) or (su sach)) ky nang cao hoi. hieu van cam ((xuc va) OR (luc va)) danh bat va triet".
• Adding a wildcard symbol may retrieve word variants: ((tu cach) or (su sach)) ky nang cao hoi. hieu van cam ((xuc va) OR (luc va)) danh bat va triet*.