Perhaps you should try some spelling variations:
hieu viec » nhieu viec, sieu viet, hieu hien
toc sach » hoc sach, doc sach, thuoc sach
hieu ve » hieu va, hieu van
vai cuu » vai cua
anh vai » anh va, anh bai, anh van
van anh » van thanh, tuan anh, van minh
cuu tre » cua tre, cau tren, cau treo
nang xa » nang x, lang xa, nang ma
cac so » cac co, cac bo, cac ho
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: ((te sach) or (toc sach)) ky nang xa hoi. ((hieu viec) OR (hieu ve)) cac so van anh vai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (toc sach)) ky nang xa hoi. ((hieu viec) OR (hieu ve)) cac so van anh vai cuu tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) or (toc sach)) ky nang xa hoi. ((hieu viec) OR (hieu ve)) cac so van anh vai cuu tre*".