Perhaps you should try some spelling variations:
trung tran » trung tuan, trung thanh, hung tran
theo hieu » theo chieu, theo tieu, thien hieu
hieu lang » chieu sang, hieu quang, nhieu tang
hong cong » thong cong, hoang cong, chong cong
cong tan » cong tac, cong san, cong thanh
toan cao » toan tap
toan ban » van ban

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 ((trung tran) or (trung tam)) hong cong tan ((toan cao) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo hieu lang - hanh ((trung tran) OR (trung tam)) hong cong tan ((toan cao) OR (toan ban)).
• Adding a wildcard symbol may retrieve word variants: theo hieu lang - hanh ((trung tran) or (trung tam)) hong cong tan ((toan cao) or (toan ban))*.