Perhaps you should try some spelling variations:
chau tinh » cuu tinh, ha tinh, cua tinh
thanh van » thanh san, thanh toan, thanh phan
hang cong » dang cong, hang nong, bang cong
trinh va » trinh van, trinh vat, trinh ve
cong tac » cong ty
phan dau » phan tu, hang dau
phan cac » nhan cach, phan lap, phan van
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: o chau tinh - canh ((trinh va) or (thanh van)) hang cong tac ((phan dau) or (phan cac))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: o chau tinh - canh ((trinh va) OR (thanh van)) hang cong tac ((phan dau) OR (phan cac)).
• Adding a wildcard symbol may retrieve word variants: o chau tinh - canh ((trinh va) or (thanh van)) hang cong tac ((phan dau) or (phan cac))*.