Perhaps you should try some spelling variations:
hieu viec » nhieu viec, hieu ve, sieu viet
viec cac » vien cac, viec cua, viec lam
van danh » van doanh, van anh, van hanh
vai cac » va cac, tai cac, voi cac
vai cau » va cau, van cau, lai chau
tu sach » thu sach, su sach, te sach
y nang » ky nang, ly nang, may nang
lo van » le van, vo van, so van
v nang » va nang, vu nang, van nang
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 ((y nang) or (v nang)) xa hoi. hieu viec cac lo van danh ((vai cau) OR (vai cac)) treo~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((y nang) OR (v nang)) xa hoi. hieu viec cac lo van danh ((vai cau) OR (vai cac)) treo*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((y nang) or (v nang)) xa hoi. hieu viec cac lo van danh ((vai cau) OR (vai cac)) treo*".