Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
nhung cong » dung cong, thong cong, hang cong
theo chu » theo chieu, cho chu, chao chu
chu xanh » chu manh, chieu xanh, chua xang
trinh va » trinh van, trinh vat, trinh ve
dan toan » van toan, manh toan, dien toan
dan than » dan chan, ban than, van than

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: theo chu xanh - hanh trinh va nhung cong ((((dan toan) OR (xuan toan))) OR (dan than)) cau~.
• Adding a wildcard symbol may retrieve word variants: theo chu xanh - hanh trinh va nhung cong ((((dan toan) or (xuan toan))) or (dan than)) cau*.