Perhaps you should try some spelling variations:
doanh van » doanh va, doanh ban, doanh nhan
lam duoc » nam duoc, luat duoc, lam thuoc
doan van » doan va, hoang van, luan van
hieu van » hieu va, thien van, lieu va
cuu tre » cua tre, cau tren, cau treo
duoc ma » duoc lam
van lam » van nam
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
te sach » toc sach
te sac » te cac, te san

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((te sac) or (te sach)) ky lang xa hoi. hieu van lam duoc ma ((doanh van) OR (doan van)) cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sac) OR (te sach)) ky lang xa hoi. hieu van lam duoc ma ((doanh van) OR (doan van)) cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sac) or (te sach)) ky lang xa hoi. hieu van lam duoc ma ((doanh van) OR (doan van)) cuu tre".
• Adding a wildcard symbol may retrieve word variants: ((te sac) or (te sach)) ky lang xa hoi. hieu van lam duoc ma ((doanh van) OR (doan van)) cuu tre*.