Perhaps you should try some spelling variations:
hieu viec » nhieu viec, hieu ve, sieu viet
cau treo » cau theo, cau tren, cau triet
ban hanh » ban hang
van danh » van doanh, van anh, van hanh
viec cac » vien cac, viec cua, viec lam
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
cuu tre » cua tre, cau tren
tu sach » thu sach, su sach, te sach
cac lo » cac lop, cac co, cac bo

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