Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
van thanh » ban thanh, van tuan
thien van » thi van
nam quoc » nam duoc, nam buoc, nam thuoc
thanh vi » hanh vi, thanh va, thanh ve
quoc van » quoc va, quoc ban, quoc lan
thi hanh » thi thanh
cao hoi » cau hoi, co hoi, cao hoc
vi cua » vai cua, di cua
te sai » te tai, te lai, te hai
te bai » te bao, te tai, te ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((te sai) OR (te bai)) ky nang cao hoi. ((thien van) or (thi hanh)) nam quoc van thanh vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sai) OR (te bai)) ky nang cao hoi. ((thien van) OR (thi hanh)) nam quoc van thanh vi cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sai) OR (te bai)) ky nang cao hoi. ((thien van) or (thi hanh)) nam quoc van thanh vi cua triet".
• Adding a wildcard symbol may retrieve word variants: ((te sai) OR (te bai)) ky nang cao hoi. ((thien van) or (thi hanh)) nam quoc van thanh vi cua triet*.