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 lai » hanh lam, hanh tai, thanh lap
tu cach » tu cac
te sach » toc sach
su tien » su kien, su hien, tu tieng
soc va » hoc va, loc va, goc va
doc va » duoc va, hoc va, duc 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 (te sach)) ky nang cau hoi. thien van cham ((soc va) OR (doc va)) hanh lai su tien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cach) OR (te sach)) ky nang cau hoi. thien van cham ((soc va) OR (doc va)) hanh lai su tien.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu cach) or (te sach)) ky nang cau hoi. thien van cham ((soc va) OR (doc va)) hanh lai su tien".
• Adding a wildcard symbol may retrieve word variants: ((tu cach) or (te sach)) ky nang cau hoi. thien van cham ((soc va) OR (doc va)) hanh lai su tien*.