Perhaps you should try some spelling variations:
trung tuan » trung thanh, trung tam, tran tuan
nhung cong » dung cong, thong cong, hang cong
lieu tinh » trieu tinh, diep tinh, bien tinh
thang cua » thong cua, hang cua, than cua
dan toan » van toan, dan than, manh toan
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 ((thang cua) or (trung tuan)) nhung cong ((dan toan) or (tinh toan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: co lieu tinh - hanh ((thang cua) OR (trung tuan)) nhung cong ((dan toan) OR (tinh toan)) cau.
• Adding a wildcard symbol may retrieve word variants: co lieu tinh - hanh ((thang cua) or (trung tuan)) nhung cong ((dan toan) or (tinh toan)) cau*.