Perhaps you should try some spelling variations:
"nhung bai luan van. biet the hien giam thuc" » "nhung bai luan van. biet the khien giam thuc", "nhung bai luan van. biet the nien giam thuc", "nhung bai luan van. biet the thien giap thuc", "nhung bai luan van. biet the hien gia thuc", "nhung bai luan van. biet the hien giang thuc", "nhung bai luan van. biet the hien am thuc", "nhung bai toan van. biet the hien giam thuc", "nhung li luan van. biet the hien giam thuc", "nhung vay luan van. biet the hien giam thuc"
"phung thi xuan ha. biet the hien cau truc" » "phung thi xa ha. biet the hien cau truc", "phung thi lan ha. biet the hien cau truc", "phung thi xuan ha. biet the khien cau truc", "phung thi xuan ha. biet the thien cau truc", "phung thi xuan ha. biet the hien cac truc", "phung thi quan ha. biet the hien cau truc", "phung thi xuan nhan. biet the hien cau truc", "phung thi quan hai. biet the hien cau truc"

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 bai luan van. biet the hien giam thuc") or ("phung thi xuan ha. biet the hien cau truc"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("nhung bai luan van. biet the hien giam thuc") OR ("phung thi xuan ha. biet the hien cau truc")).
• Removing quotes may allow a broader search: (( nhung bai luan van. biet the hien giam thuc ) or ( phung thi xuan ha. biet the hien cau truc )).
• Adding a wildcard symbol may retrieve word variants: (("nhung bai luan van. biet the hien giam thuc") or ("phung thi xuan ha. biet the hien cau truc"))*.