Perhaps you should try some spelling variations:
canh trinh » canh tranh, hanh trinh, canh tinh
nhung cong » dung cong, thong cong, hang cong
lieu tinh » trieu tinh, diep tinh, bien tinh
manh toan » thanh toan, anh tuan, tinh toan
trinh va » trinh van, trinh vat, trinh ve
ho lieu » so lieu, co lieu, ho kieu

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ho lieu tinh - canh trinh va nhung cong ((xuan toan) OR (manh toan)) cau~.
• Adding a wildcard symbol may retrieve word variants: ho lieu tinh - canh trinh va nhung cong ((xuan toan) or (manh toan)) cau*.