Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
lieu tinh » trieu tinh, diep tinh, bien tinh
chinh cua » chinh ca, chinh sua, hinh cua
cua nhung » va nhung
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 chinh cua nhung cong ((dan toan) or (dan chan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: co lieu tinh - hanh chinh cua nhung cong ((dan toan) OR (dan chan)) cau.
• Adding a wildcard symbol may retrieve word variants: co lieu tinh - hanh chinh cua nhung cong ((dan toan) or (dan chan)) cau*.