Perhaps you should try some spelling variations:
nhung cong » thong cong, hang cong, nhung don
chieu xanh » chieu sach, chieu sang, chieu tinh
hanh than » hanh han, hanh nhan, hanh phan
dung cong » dung trong
ho chieu » theo chieu, hoc thieu, doi chieu
than cua » nhan cua, thai cua, ban cua
tan toan » tan tran, tap toan, dan toan
van toan » van tuan, van tan, van thanh

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho chieu xanh - hanh than cua ((nhung cong) OR (dung cong)) ((tan toan) or (van toan)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu xanh - hanh than cua ((nhung cong) OR (dung cong)) ((tan toan) OR (van toan)) cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu xanh - hanh than cua ((nhung cong) OR (dung cong)) ((tan toan) or (van toan)) cao".
• Adding a wildcard symbol may retrieve word variants: ho chieu xanh - hanh than cua ((nhung cong) OR (dung cong)) ((tan toan) or (van toan)) cao*.