Perhaps you should try some spelling variations:
nhieu viec » nhien viet
thanh van » thanh san, thanh toan, thanh phan
hieu viec » hieu ve, sieu viet, hieu hien
van thanh » ban thanh, van tuan
van cuu » van cau, van chu, van cu
sach ky » sac ky, sach y, sach ty
te sach » toc sach
nang ma » tang ma, sang ma, nang cao
cuu tre » cua tre, cau tren, cau treo
cac so » cac co, cac ho, cac o
cac bo » bac bo, cac co
ma hoi » mai hoi, xa hoi, ma hoa

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