Perhaps you should try some spelling variations:
doanh doanh » toan doanh, doanh hoan, doanh thanh
phuong dong » phuong dung, phuong hoang, chuong duong
dung doanh » dung dan, dung dong
cua phuong » cuu phuong, cuc phuong, luan phuong
theo hieu » theo chieu, theo tieu, thien hieu
hieu lang » chieu sang, hieu quang, nhieu tang
dong tac » cong tac, dong tai, dong bac
hai tap » hai thap, bai tap, han tap
ha tap » han tap, pha tap, ha tay

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo hieu lang - ((doanh doanh) or (dung doanh)) cua phuong dong tac ((ha tap) or (hai tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo hieu lang - ((doanh doanh) OR (dung doanh)) cua phuong dong tac ((ha tap) OR (hai tap)).
• Adding a wildcard symbol may retrieve word variants: theo hieu lang - ((doanh doanh) or (dung doanh)) cua phuong dong tac ((ha tap) or (hai tap))*.