Perhaps you should try some spelling variations:
tranh trong » tran trong, trinh trong, anh trong
thanh trong » thanh trung, hanh trong, nhanh trong
chieu xanh » chieu sach, chieu sang, chieu tinh
cong thanh » dong thanh, cong trinh, cong tan
quan dung » quang dung, quan duong, qua dung
ho chieu » theo chieu, hoc thieu, doi chieu
cong tac » cong ty
toan cau » toan cao, toan ban, toan tap

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 - ((thanh trong) OR (tranh trong)) quan dung ((cong thanh) or (cong tac)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu xanh - ((thanh trong) OR (tranh trong)) quan dung ((cong thanh) OR (cong tac)) toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu xanh - ((thanh trong) OR (tranh trong)) quan dung ((cong thanh) or (cong tac)) toan cau".
• Adding a wildcard symbol may retrieve word variants: ho chieu xanh - ((thanh trong) OR (tranh trong)) quan dung ((cong thanh) or (cong tac)) toan cau*.