Perhaps you should try some spelling variations:
trinh cua » tinh cua, trinh quan, trinh luan
hang cong » dang cong, hang nong, bang cong
ban thanh » ban hanh, ban hang
chu sang » thu sang, chieu sang, chuc nang
chu bang » thu bang, chuc nang, chu quang
cong ban » cong bang, cong san, cong tan
thanh ca » thanh cha, thanh cac, thanh ha

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chu sang) or (chu bang)) - hanh ((trinh cua) or (trinh luat)) hang cong ban thanh ca~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chu sang) OR (chu bang)) - hanh ((trinh cua) OR (trinh luat)) hang cong ban thanh ca.
• Adding a wildcard symbol may retrieve word variants: theo ((chu sang) or (chu bang)) - hanh ((trinh cua) or (trinh luat)) hang cong ban thanh ca*.