Perhaps you should try some spelling variations:
nhung cong » thong cong, hang cong, nhung don
chu quang » chat quang, vu quang
dung cong » dung trong
dung cua » dung luan, dung cho
van tuan » van quan, van ban, anh tuan
tuan ban » tuan bang, toan ban, luan ban
chuc » thuc, chua, phuc

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 quang) or (chuc nang)) - trinh dung cua ((nhung cong) OR (dung cong)) van tuan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chu quang) OR (chuc nang)) - trinh dung cua ((nhung cong) OR (dung cong)) van tuan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chu quang) or (chuc nang)) - trinh dung cua ((nhung cong) OR (dung cong)) van tuan ban".
• Adding a wildcard symbol may retrieve word variants: theo ((chu quang) or (chuc nang)) - trinh dung cua ((nhung cong) OR (dung cong)) van tuan ban*.