Perhaps you should try some spelling variations:
duong cong » luong cong, duong trong, trong cong
canh trang » canh tranh, hanh trang, banh trang
lieu tinh » trieu tinh, diep tinh, bien tinh
dung cong » dung trong
trang va » tran van, hang va
dan toan » van toan, dan than, manh toan
toan cao » toan ban, toan tap
co lieu » cot lieu, co hieu, so lieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: co lieu tinh - canh trang va ((duong cong) or (dung cong)) dan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: co lieu tinh - canh trang va ((duong cong) OR (dung cong)) dan toan cao.
• Adding a wildcard symbol may retrieve word variants: co lieu tinh - canh trang va ((duong cong) or (dung cong)) dan toan cao*.