Perhaps you should try some spelling variations:
tang cuong » nang luong
lanh tranh » canh tranh, lan tranh, hanh trinh
cuong danh » cuon danh, huong dan, cuong linh
danh toan » manh toan, anh toan, dan toan
doc hieu » toc thieu, hoc thieu, hoc hien
tranh va » tranh van, trang va, trinh va
toan ban » van ban
va tang » va trang, van tang, ha tang

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((doc hieu) or (theo tieu)) xanh - lanh tranh va tang cuong danh toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc hieu) OR (theo tieu)) xanh - lanh tranh va tang cuong danh toan ban.
• Adding a wildcard symbol may retrieve word variants: ((doc hieu) or (theo tieu)) xanh - lanh tranh va tang cuong danh toan ban*.