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
tu tieng » luc tieng, tu tuong, tu trong
tu sach » thu sach, su sach, tu cach
te sach » toc sach
soc va » hoc va, doc va, goc va
loc va » hoc va, luc va
va tu » va su

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) or (te sach)) ky nang cau hoi. thien van cham ((soc va) OR (loc va)) hang va tu tieng~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) ky nang cau hoi. thien van cham ((soc va) OR (loc va)) hang va tu tieng.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (te sach)) ky nang cau hoi. thien van cham ((soc va) OR (loc va)) hang va tu tieng".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (te sach)) ky nang cau hoi. thien van cham ((soc va) OR (loc va)) hang va tu tieng*.