Perhaps you should try some spelling variations:
tinh khang » trinh khung, tinh quang, tinh thanh
tinh khong » tinh huong, benh khong, tinh hung
hieu soat » hieu suat, hieu hoat, hieu luat
tien soat » trien hoat, thien hoat, kiem soat
tin quan » tinh quang, trinh quan, lien quan
van hieu » cao hieu
van tien » toan tien, van tuan

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

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