Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
theo hieu » theo chieu, theo tieu, thien hieu
hieu lang » chieu sang, hieu quang, nhieu tang
chua xang » chua nang, chuc nang, chua dong
manh toan » thanh toan, anh tuan, tinh toan
chu bang » thu bang, chuc nang, chu quang
van tuan » van quan, van ban, anh tuan

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 hieu lang - hanh trinh ((chua xang) OR (chu bang)) song ((manh toan) OR (van tuan)) ban~.
• Adding a wildcard symbol may retrieve word variants: theo hieu lang - hanh trinh ((chua xang) or (chu bang)) song ((manh toan) or (van tuan)) ban*.