Perhaps you should try some spelling variations:
doanh van » doan van, doanh ban, doanh nhan
doanh va » doan va, doanh tai, doanh cua
dang ha » dong ha, lang ha, tang ha
dung ha » dung va, dung he, dung khoa
hieu ve » hieu va, hieu van
cac tac » cac toc, cac bac, cac dac
tac vay » tac va, tac van, tac cay
te cao » te bao
ve cac » va cac, vien cac
cua te » cua tu

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 ((dang ha) or (dung ha)) hoi. hieu ve cac tac vay ((doanh van) OR (doanh va)) cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te cao ky ((dang ha) OR (dung ha)) hoi. hieu ve cac tac vay ((doanh van) OR (doanh va)) cua te*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te cao ky ((dang ha) or (dung ha)) hoi. hieu ve cac tac vay ((doanh van) OR (doanh va)) cua te*".