Perhaps you should try some spelling variations:
chieu chien » thien chien, hieu hien
hieu viec » nhieu viec, hieu ve, sieu viet
cau theo » cau thi, cau tao
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
va hanh » van hanh, va thanh, va danh
cac tu » cac thu, cach tu, cac du
vi cau » va cau, ve cau, di cau

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 ky nang xa hoi. ((hieu viec) or (chieu chien)) cac tu va hanh vi cau theo~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang xa hoi. ((hieu viec) OR (chieu chien)) cac tu va hanh vi cau theo.
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang xa hoi. ((hieu viec) or (chieu chien)) cac tu va hanh vi cau theo*.