Perhaps you should try some spelling variations:
thanh van » thanh san, thanh toan, thanh phan
hieu viec » nhieu viec, hieu ve, sieu viet
van thanh » ban thanh, van tuan
te sach » toc sach
sach ky » sac ky, sach y, sach ty
van cuu » van cau, van chu, van cu
cuu tre » cua tre, cau tren, cau treo
nang ma » tang ma, sang ma, nang cao
cac ho » cac hop, cac hoc, cac co
cac bo » bac bo, cac co
cac so » cac co, cac o, tac so
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 ((((cac so) OR (cac ho))) 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 ((((cac so) OR (cac ho))) 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 ((((cac so) OR (cac ho))) or (cac bo)) van thanh van cuu tre*".