Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
chu quang » chat quang, vu quang
cua nhung » va nhung
chu sang » chu bang, thu sang, chieu sang
hanh ban » thanh ban, hang ban, hanh san
cong tan » cong tac, cong san, cong thanh
ban cua » ban quan
tan van » tran van, tang van, luan van

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