Perhaps you should try some spelling variations:
trong dang » truong dang, trong dan, trong dong
lieu tinh » trieu tinh, diep tinh, bien tinh
tang luan » dung luan
dang toan » dang tran, dan toan, dung toan
doc lieu » duoc lieu, doc hieu, du lieu
thong tu » phong tuc, thong tin, thong ke
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: doc lieu tinh - hanh ((thong tu) OR (tang luan)) dung trong dang toan ban~.
• Adding a wildcard symbol may retrieve word variants: doc lieu tinh - hanh ((thong tu) or (tang luan)) dung trong dang toan ban*.