Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
lieu tinh » trieu tinh, diep tinh, bien tinh
trang va » hang va
tran van » luan van
cong sat » cong suat, cong san, cong hat
phan cac » nhan cach, phan lap, phan van
phan dau » phan tu, hang dau
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 sat ((phan cac) OR (phan dau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: co lieu tinh - canh ((trang va) OR (tran van)) nhung cong sat ((phan cac) OR (phan dau)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "co lieu tinh - canh ((trang va) or (tran van)) nhung cong sat ((phan cac) OR (phan dau))".
• Adding a wildcard symbol may retrieve word variants: co lieu tinh - canh ((trang va) or (tran van)) nhung cong sat ((phan cac) OR (phan dau))*.