Perhaps you should try some spelling variations:
phong thi » phuong thi, phung thi, phong tri
khien cau » hien cau, thien cau, khien canh
nhung thi » nhung thoi, phung thi, nhung tri
thi luan » thi lan, thi xuan, thi loan
thi quan » thi xuan, tri quan, phi quan
quan van » quan va, quan luan, quan doan
cau luc » cau truc, cau phuc
cau xuc » cam xuc, cau truc, chat xuc

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( phong thi luan van. biet the khien cau luc ) or ( nhung thi quan van. biet the khien cau xuc ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( phong thi luan van. biet the khien cau luc ) OR ( nhung thi quan van. biet the khien cau xuc )).
• Adding a wildcard symbol may retrieve word variants: (( phong thi luan van. biet the khien cau luc ) or ( nhung thi quan van. biet the khien cau xuc ))*.