Perhaps you should try some spelling variations:
thien van » thi van
nang cau » nang cao, hang cau, nang dau
van cham » van chat, van tham, va cham
hanh lam » thanh lap, hanh kem, hanh va
so triet » su triet, so thiet, bo triet
soc va » loc va, doc va, goc va
lam so » lam son, nam so, ham so

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu cac ky nang cau hoi. thien van cham ((soc va) or (hoc va)) hanh lam so triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cac ky nang cau hoi. thien van cham ((soc va) OR (hoc va)) hanh lam so triet.
• Adding a wildcard symbol may retrieve word variants: tu cac ky nang cau hoi. thien van cham ((soc va) or (hoc va)) hanh lam so triet*.