Perhaps you should try some spelling variations:
nhanh lang » nhanh quang, nhanh thang, nhanh dong
nhan dang » nhan dan, phan dang, tran dang
luan hung » luan chung, luan ung, tuan hung
theo chu » theo chieu, cho chu, chao chu
lan hung » van hung, luan chung, lan phuong
cong san » cong tac
chu han » chu van
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: theo chu han - ((nhanh lang) or (nhan dang)) ((luan hung) OR (lan hung)) cong san van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chu han - ((nhanh lang) OR (nhan dang)) ((luan hung) OR (lan hung)) cong san van ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chu han - ((nhanh lang) or (nhan dang)) ((luan hung) OR (lan hung)) cong san van ban".
• Adding a wildcard symbol may retrieve word variants: theo chu han - ((nhanh lang) or (nhan dang)) ((luan hung) OR (lan hung)) cong san van ban*.