Perhaps you should try some spelling variations:
quan trong » gian trong
nhung thoi » phung thi, nhung loi, nhung tri
nhung thi » phung thi, nhung tri, nhung chi
biet quan » viet quan, bien quang, viet quang
cac tuan » cac thanh, cac thuat, cac tuong
luan va » luan van, luat va
quan vi » quan li, quan tri, quan doi

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 thoi)) ((luan va) or (quan vi)). biet quan trong cac tuan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((nhung thi) OR (nhung thoi)) ((luan va) OR (quan vi)). biet quan trong cac tuan.
• Adding a wildcard symbol may retrieve word variants: ((nhung thi) or (nhung thoi)) ((luan va) or (quan vi)). biet quan trong cac tuan*.