Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
cua nhung » va nhung
chu bang » thu bang, chuc nang, chu quang
hang ban » hang luan, hang va, hang tai
cong tap » cuong tap, cong tac, cong tan
tap toan » tap doan, tap quan, bai toan
toan ban » van ban
ban cua » ban quan

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 bang) or (vu quang)) - hang ban cua nhung cong tap toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chu bang) OR (vu quang)) - hang ban cua nhung cong tap toan ban.
• Adding a wildcard symbol may retrieve word variants: theo ((chu bang) or (vu quang)) - hang ban cua nhung cong tap toan ban*.