Perhaps you should try some spelling variations:
hieu viec » nhieu viec, hieu ve, sieu viet
van hanh » van thanh, van anh, van ban
ban hanh » ban hang
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
viec va » vien va, viec cua, viec lam
cuu tre » cau tren, cau treo
cua tre » cua te, cua triet, dua tren
va loi » van loi, va doi

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 va loi ((van hanh) OR (ban hanh)) va ((cuu tre) or (cua tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang xa hoi. hieu viec va loi ((van hanh) OR (ban hanh)) va ((cuu tre) OR (cua tre))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang xa hoi. hieu viec va loi ((van hanh) OR (ban hanh)) va ((cuu tre) or (cua tre))*".