Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sang » chieu sach, chieu xanh, hieu lang
tuan dang » tuan bang, tuan dung, tuan duong
tran dang » tran quang, tran hoang, tranh hang
ho chieu » theo chieu, hoc thieu, doi chieu
cong tac » cong ty
than cau » phan cau, than cap, thanh chau
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 sang - thanh trung ((tuan dang) or (tran dang)) cong tac ((than cau) OR (toan cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sang - thanh trung ((tuan dang) OR (tran dang)) cong tac ((than cau) OR (toan cau)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu sang - thanh trung ((tuan dang) or (tran dang)) cong tac ((than cau) OR (toan cau))".
• Adding a wildcard symbol may retrieve word variants: ho chieu sang - thanh trung ((tuan dang) or (tran dang)) cong tac ((than cau) OR (toan cau))*.