Perhaps you should try some spelling variations:
hieu lang » chieu sang, hieu quang, nhieu tang
dung cong » dung trong
trong ca » trong cac, trong nha
thong tu » phong tuc, thong tin, thong ke
tan doan » tran doan, tap doan, toan doanh
van doan » van doanh, van toan, van hoan
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 ((tan doan) OR (van doan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho hieu lang - hanh ((trong ca) OR (thong tu)) dung cong ((tan doan) OR (van doan)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho hieu lang - hanh ((trong ca) or (thong tu)) dung cong ((tan doan) OR (van doan)) cau".
• Adding a wildcard symbol may retrieve word variants: ho hieu lang - hanh ((trong ca) or (thong tu)) dung cong ((tan doan) OR (van doan)) cau*.