Perhaps you should try some spelling variations:
doanh van » doan van, doanh va, doanh ban
hieu van » thien van, lieu va, hieu ve
lam nuoc » lam duoc, lam ngoc, lam nguoi
va doanh » van doanh, vay doanh, va danh
nang xa » lang xa, nang ma, mang xa
hieu va » lieu va, hieu qua
van cuu » van cau, van chu, van cu
cuu tre » cua tre, cau tren, cau treo
te cao » te bao

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

• Performing a fuzzy search may retrieve terms with similar spellings: te cao ky ((nang xa) or (nang x)) hoi. ((hieu van) OR (hieu va)) lam nuoc va doanh van cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te cao ky ((nang xa) OR (nang x)) hoi. ((hieu van) OR (hieu va)) lam nuoc va doanh van cuu tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te cao ky ((nang xa) or (nang x)) hoi. ((hieu van) OR (hieu va)) lam nuoc va doanh van cuu tre*".