Perhaps you should try some spelling variations:
thanh thong » thanh thuong, thanh hong, thanh chuong
thanh thang » nhanh thang, thanh thanh, thanh hang
chieu sang » chieu sach, chieu xanh, hieu lang
hanh trung » thanh trung, hanh trang, manh trung
toc chieu » toc thieu, doc hieu, hoc thieu
hang luan » tang luan, dung luan
cong tac » cong ty
hang ban » hang va, hang tai, hang dau

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc chieu sang - hanh trung ((thanh thong) OR (thanh thang)) cong tac ((hang ban) or (hang luan))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc chieu sang - hanh trung ((thanh thong) OR (thanh thang)) cong tac ((hang ban) OR (hang luan)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc chieu sang - hanh trung ((thanh thong) OR (thanh thang)) cong tac ((hang ban) or (hang luan))".
• Adding a wildcard symbol may retrieve word variants: toc chieu sang - hanh trung ((thanh thong) OR (thanh thang)) cong tac ((hang ban) or (hang luan))*.