Perhaps you should try some spelling variations:
doanh ban » doanh bat, doanh nhan, doanh luan
doanh van » doan van, doanh va, doanh nhan
dai truc » dai thuc, doan truc, dai trung
hieu van » hieu va, thien van, lieu va
te sach » toc sach
cuu tre » cua tre, cau tren, cau treo
sach ky » sac ky, sach y, sach ty
ba truc » cau truc, ba trung, nam truc
nang ma » tang ma, sang ma, nang cao
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 van ((ba truc) OR (dai truc)) va ((doanh van) or (doanh ban)) cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang ma hoi. hieu van ((ba truc) OR (dai truc)) va ((doanh van) OR (doanh ban)) cuu tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang ma hoi. hieu van ((ba truc) OR (dai truc)) va ((doanh van) or (doanh ban)) cuu tre*".