Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
lieu tinh » trieu tinh, diep tinh, bien tinh
nhan cach » phan cac
trang va » hang va
tran van » luan van
cong san » cong tac
san nhan » van nhan, ban nhan, sat nhan
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) or (tran van)) nhung cong san nhan cach~.
• If you are trying to use Boolean operators, they must be ALL CAPS: co lieu tinh - canh ((trang va) OR (tran van)) nhung cong san nhan cach.
• Adding a wildcard symbol may retrieve word variants: co lieu tinh - canh ((trang va) or (tran van)) nhung cong san nhan cach*.