Perhaps you should try some spelling variations:
quan trong » gian trong
nhung thi » nhung thoi, phung thi, nhung tri
nhung loi » nhung bai, nhung bi, nhung bo
tran hong » tran hoang, tran trong, tranh hang
nhung gi » nhung bi, nhung bai
cac tuan » cac thanh, cac thuat, cac tuong
quan va » quan vi, quan ha, luan va

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((nhung thi) or (((nhung loi) OR (nhung gi)))) quan va. biet ((quan trong) or (tran hong)) cac tuan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((nhung thi) OR (((nhung loi) OR (nhung gi)))) quan va. biet ((quan trong) OR (tran hong)) cac tuan.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((nhung thi) or (((nhung loi) OR (nhung gi)))) quan va. biet ((quan trong) or (tran hong)) cac tuan".
• Adding a wildcard symbol may retrieve word variants: ((nhung thi) or (((nhung loi) OR (nhung gi)))) quan va. biet ((quan trong) or (tran hong)) cac tuan*.