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
trinh cua » tinh cua, trinh luat, trinh quan
tong tap » tuong tac, trong tan, cong tac
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: theo hieu lang - hanh trinh cua cong ((tong tap) or (cong tan)) toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo hieu lang - hanh trinh cua cong ((tong tap) OR (cong tan)) toan cao.
• Adding a wildcard symbol may retrieve word variants: theo hieu lang - hanh trinh cua cong ((tong tap) or (cong tan)) toan cao*.