Perhaps you should try some spelling variations:
nhieu tang » chieu sang, nhiet nang
nhung cong » dung cong, thong cong, hang cong
hieu lang » chieu sang, hieu quang, hieu van
canh manh » canh tranh, cach mang, van manh
lanh manh » lanh tranh, lan anh, van manh
cong luan » tong luan, cong tuan, dong luan

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

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