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