Perhaps you should try some spelling variations:
hieu lang » chieu sang, hieu quang, nhieu tang
dung cong » dung trong
tap doanh » tap doan, lap doanh, tap danh
doanh cao » doanh co, doanh bao, doanh cho
trong ca » trong cac, trong nha
thong tu » phong tuc, thong tin, thong ke
cong tap » cuong tap, cong tac, cong tan
ho hieu » ho chieu, hoi hieu, nho hieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho hieu lang - hanh ((trong ca) or (thong tu)) dung cong tap doanh cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho hieu lang - hanh ((trong ca) OR (thong tu)) dung cong tap doanh cao.
• Adding a wildcard symbol may retrieve word variants: ho hieu lang - hanh ((trong ca) or (thong tu)) dung cong tap doanh cao*.