Perhaps you should try some spelling variations:
doanh van » doan van, doanh va, doanh ban
hieu van » hieu va, thien van, lieu va
duoc va » nuoc va, duc va, duong va
van cuu » van cau, van chu, van cu
duoc ma » duoc lam
cuu tre » cua tre, cau tren, cau treo
van lam » van nam
nang xa » lang xa, nang ma, mang xa
sac ky » cac ky, sai ky
te sac » te sach, 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 ky ((nang xa) or (nang x)) hoi. hieu van lam ((duoc va) OR (duoc ma)) doanh van cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky ((nang xa) OR (nang x)) hoi. hieu van lam ((duoc va) OR (duoc ma)) doanh van cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sac ky ((nang xa) or (nang x)) hoi. hieu van lam ((duoc va) OR (duoc ma)) doanh van cuu tre".
• Adding a wildcard symbol may retrieve word variants: te sac ky ((nang xa) or (nang x)) hoi. hieu van lam ((duoc va) OR (duoc ma)) doanh van cuu tre*.