Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
khoa chau » khoai chau, khoa phau, khoa cham
tranh va » tranh van, trang va, trinh va
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan cao » toan ban, toan tap
ho chau » ha chau, ho chu, moc chau
o chau » a chau, 3 chau, moc chau

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((((ho chau) or (khoa chau))) or (o chau)) tinh - canh tranh va nhung cong dan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((((ho chau) OR (khoa chau))) OR (o chau)) tinh - canh tranh va nhung cong dan toan cao.
• Adding a wildcard symbol may retrieve word variants: ((((ho chau) or (khoa chau))) or (o chau)) tinh - canh tranh va nhung cong dan toan cao*.