Perhaps you should try some spelling variations:
thieu tinh » trieu tinh, chieu tinh, thien tinh
trong tinh » truong tinh, trong kinh, trong sinh
hoc thieu » toc thieu, hoc hien
tang vat » dang vat, bang vat, cang vat
tang van » hoang van, trong van, tang luan
dang van » hoang van, hang va
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: hoc thieu tinh - canh ((tang vat) OR (((tang van) OR (dang van)))) dung trong tinh toan ban~.
• Adding a wildcard symbol may retrieve word variants: hoc thieu tinh - canh ((tang vat) or (((tang van) or (dang van)))) dung trong tinh toan ban*.