Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hanh trinh » canh tranh, hanh chinh
lieu tinh » trieu tinh, diep tinh, bien tinh
trinh cua » tinh cua, trinh luat, trinh quan
cua nhung » va nhung
cot lieu » co lieu, vat lieu, so lieu
dan toan » van toan, dan than, manh toan
van tuan » van quan, van ban, anh tuan

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

• Performing a fuzzy search may retrieve terms with similar spellings: cot lieu tinh - hanh trinh cua nhung cong ((((dan toan) or (van tuan))) or (dan gian)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: cot lieu tinh - hanh trinh cua nhung cong ((((dan toan) OR (van tuan))) OR (dan gian)) cau.
• Adding a wildcard symbol may retrieve word variants: cot lieu tinh - hanh trinh cua nhung cong ((((dan toan) or (van tuan))) or (dan gian)) cau*.