Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thanh lam » thanh lap, hanh lam, thanh nam
hieu van » hieu va, thien van, lieu va
vu khach » vu khanh, vay khach, cua khach
van cau » van dau, van hau, van chat
vu khac » vu kham, vu khanh, bui khac
lam cua » nam cua, lam chat
nang o » nang co, nang ho, nang ro
xuc va » duc va, tuc va, xac va
luc va » duc va, tuc va, loc va
o hoi » co hoi, o hoc, o hai

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((vu khach) OR (vu khac)) ky nang o hoi. hieu van cau ((xuc va) or (luc va)) thanh lam cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu khach) OR (vu khac)) ky nang o hoi. hieu van cau ((xuc va) OR (luc va)) thanh lam cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((vu khach) OR (vu khac)) ky nang o hoi. hieu van cau ((xuc va) or (luc va)) thanh lam cua triet".
• Adding a wildcard symbol may retrieve word variants: ((vu khach) OR (vu khac)) ky nang o hoi. hieu van cau ((xuc va) or (luc va)) thanh lam cua triet*.