Perhaps you should try some spelling variations:
tran trong » gian trong, quan trong, tran hong
nhung thoi » nhung thi, phung thi, nhung tri
trong ngan » trong nganh, trong ngang, thong ngan
nhung loi » nhung bai, nhung bi, nhung gi
viet tran » viet trang, viet tuan, viet trung
quan van » luan van, quan va, quan luan

Try widening your search to All Fields.

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

• Performing a fuzzy search may retrieve terms with similar spellings: "((nhung thoi) or (nhung loi)) quan van. viet tran trong ngan (hang" OR nang")~.
• If you are trying to use Boolean operators, they must be ALL CAPS: "((nhung thoi) OR (nhung loi)) quan van. viet tran trong ngan (hang" OR nang").
• Removing quotes may allow a broader search: ((nhung thoi) or (nhung loi)) quan van. viet tran trong ngan (hang OR nang ).
• Adding a wildcard symbol may retrieve word variants: "((nhung thoi) or (nhung loi)) quan van. viet tran trong ngan (hang" OR nang")*.