Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
hieu lang » chieu sang, hieu quang, nhieu tang
trinh cua » tinh cua, trinh luat, trinh quan
trong ban » trong san, trong quan, trong cac
trong tan » trong quan, trong cac, trong ca
doi hieu » doi chieu, doc hieu, doi hien
cua dung » cua dang, cua dong, qua dung
toan cao » toan ban, toan tap

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: doi hieu lang - hanh trinh cua dung ((trong ban) OR (trong tan)) toan cao~.
• Adding a wildcard symbol may retrieve word variants: doi hieu lang - hanh trinh cua dung ((trong ban) or (trong tan)) toan cao*.