Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
chau tinh » cuu tinh, ha tinh, cua tinh
cong tran » cong tan, cong tuan, cong toan
doi chau » doi chieu, gioi chau, hoi chu
trung va » truong va, trang va, trung ha
tran van » luan van
van chat » cao chat
tung va » tuong va, dung va, vung va

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chau tinh - thanh ((tung va) or (trung va)) nhung cong tran van chat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chau tinh - thanh ((tung va) OR (trung va)) nhung cong tran van chat.
• Adding a wildcard symbol may retrieve word variants: doi chau tinh - thanh ((tung va) or (trung va)) nhung cong tran van chat*.