Perhaps you should try some spelling variations:
hieu quang » thieu quang, hieu quan, hieu qua
hanh trinh » canh tranh, hanh chinh
trinh cua » tinh cua, trinh luat, trinh quan
hoi hieu » hoi phieu, hoi tieu, moi hieu
cua dang » cua cong, cua ban
cong tap » cuong tap, cong tac, tong tap
cong tan » cong tac, cong san, cong thanh
toan cao » toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoi hieu quang - hanh trinh cua dang ((cong tap) or (cong tan)) toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoi hieu quang - hanh trinh cua dang ((cong tap) OR (cong tan)) toan cao.
• Adding a wildcard symbol may retrieve word variants: hoi hieu quang - hanh trinh cua dang ((cong tap) or (cong tan)) toan cao*.