Perhaps you should try some spelling variations:
chua xang » chua nang, chuc nang, chu bang
hanh tung » thanh tung, manh tung, hanh dung
anh tang » anh bang, anh dang, anh nang
va trong » va truong, va thong, va tuong
cong san » cong tac
ho chua » ho chung
san van » tan van, luan van, tran van

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho chua xang - ((hanh tung) or (anh tang)) va trong cong san van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chua xang - ((hanh tung) OR (anh tang)) va trong cong san van ban.
• Adding a wildcard symbol may retrieve word variants: ho chua xang - ((hanh tung) or (anh tang)) va trong cong san van ban*.