Perhaps you should try some spelling variations:
phuong xuan » phuong quang, luong xuan, duong xuan
dung phuong » dung thuong, bang phuong, dung chung
tinh dung » tin dung, tinh quang, tinh huong
hieu soat » hieu suat, hieu hoat, hieu luat
xuan bien » xuan dien, xuan kien, xuan vien
bien soan » bien so
quan van » quan va, quan luan, quan doan
luan » lan

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( tinh dung ((quan van) or (luan van)) hieu soat ) or ( trinh dung phuong xuan bien soan ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tinh dung ((quan van) OR (luan van)) hieu soat ) OR ( trinh dung phuong xuan bien soan )).
• Adding a wildcard symbol may retrieve word variants: (( tinh dung ((quan van) or (luan van)) hieu soat ) or ( trinh dung phuong xuan bien soan ))*.