Perhaps you should try some spelling variations:
nhieu viec » nhien viet
hieu viec » hieu ve, sieu viet, hieu hien
tu sach » thu sach, su sach, te sach
van anh » van thanh, tuan anh, van minh
vai cua » dai cua, hai cua, lai cua
cac lop » cac hop, cac loai
lop van » lo van, long van, loai van
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma

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