Perhaps you should try some spelling variations:
tieu tinh » tieu trinh, lieu tinh, kieu tinh
hanh dung » thanh dung, anh dung, hanh dong
luan nang » luan van, van nang, luan san
nang cong » nang song, dang cong, bang cong
cong van » cong vang, cong san, song van
toan cau » toan cao, toan tap, toan tai
toan ban » van ban

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

• If you are trying to use Boolean operators, they must be ALL CAPS: thep ((tieu tinh) OR (trieu tinh)) - hanh dung luan nang cong van ((toan cau) OR (toan ban))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thep ((tieu tinh) OR (trieu tinh)) - hanh dung luan nang cong van ((toan cau) or (toan ban))~".
• Adding a wildcard symbol may retrieve word variants: thep ((tieu tinh) OR (trieu tinh)) - hanh dung luan nang cong van ((toan cau) or (toan ban))*.