Perhaps you should try some spelling variations:
thanh tran » thanh trang, thanh toan, thanh tra
hang khong » hang thuong, hang khoa, hang nong
chu xanh » chu manh, chieu xanh, chua xang
tran van » luan van
van hang » van khang, van hoang, van thang
tap toan » tap doan, tap quan, bai toan
va toan » van toan, bai toan, va thanh

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chu xanh) or (ho manh)) - thanh tran van hang khong ((va toan) OR (tap toan)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chu xanh) OR (ho manh)) - thanh tran van hang khong ((va toan) OR (tap toan)) cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chu xanh) or (ho manh)) - thanh tran van hang khong ((va toan) OR (tap toan)) cao".
• Adding a wildcard symbol may retrieve word variants: theo ((chu xanh) or (ho manh)) - thanh tran van hang khong ((va toan) OR (tap toan)) cao*.