Perhaps you should try some spelling variations:
chuong duong » cuong duong, tuong duong, cuong dung
thuong luong » theo luong, cong luong, thong thuong
hien quang » dien quang, bien quang, hien quan
manh toan » thanh toan, anh tuan, tinh toan
tranh va » tranh van, trang va, trinh va
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hien quang - canh tranh va ((chuong duong) or (thuong luong)) manh toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien quang - canh tranh va ((chuong duong) OR (thuong luong)) manh toan ban.
• Adding a wildcard symbol may retrieve word variants: hoc hien quang - canh tranh va ((chuong duong) or (thuong luong)) manh toan ban*.