Perhaps you should try some spelling variations:
hieu lang » chieu sang, hieu quang, nhieu tang
luan dung » lan dung, luan dong, luan hung
dung cong » dung trong
thanh tap » thanh lap, thanh tay, thanh tam
thanh tai » thanh hai, thanh toan, doanh tai
anh tang » anh bang, anh dang, anh nang
cong van » cong vang, cong san, song van
ho hieu » ho chieu, hoi hieu, nho hieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho hieu lang - ((canh tranh) or (anh tang)) luan dung cong van ((thanh tap) OR (thanh tai))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho hieu lang - ((canh tranh) OR (anh tang)) luan dung cong van ((thanh tap) OR (thanh tai)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho hieu lang - ((canh tranh) or (anh tang)) luan dung cong van ((thanh tap) OR (thanh tai))".
• Adding a wildcard symbol may retrieve word variants: ho hieu lang - ((canh tranh) or (anh tang)) luan dung cong van ((thanh tap) OR (thanh tai))*.