Perhaps you should try some spelling variations:
nhieu viec » nhien viet
hieu viec » hieu ve, sieu viet, hieu hien
cau treo » cau theo, cau tren, cau triet
nang xa » nang x, lang xa, nang ma
anh vai » anh va, anh bai, anh van
vai cau » va cau, van cau, vai cac
tu sach » thu sach, su sach, te sach
y nang » ky nang, ly nang, v nang
lo van » le van, vo van, do van
so van » su van, vo van

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