Perhaps you should try some spelling variations:
nhung cong » dung cong, hang cong, nhung don
hanh trinh » canh tranh, hanh chinh
thong cong » trong cong, tong cong, thong thong
lieu tinh » trieu tinh, diep tinh, bien tinh
trinh cua » tinh cua, trinh luat, trinh quan
dan toan » van toan, dan than, manh toan
dan chan » dan gian, dan ca, van chat
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 - hanh trinh cua ((nhung cong) OR (thong cong)) ((dan toan) or (dan chan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: co lieu tinh - hanh trinh cua ((nhung cong) OR (thong cong)) ((dan toan) OR (dan chan)) cau*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "co lieu tinh - hanh trinh cua ((nhung cong) OR (thong cong)) ((dan toan) or (dan chan)) cau*".