Perhaps you should try some spelling variations:
khien tinh » thien tinh, khien thich, bien tinh
trung tuan » trung thanh, trung tam, tran tuan
hoc khien » hoc hien, hoc nghien, hoc thieu
trung cua » truong cua, trung cap, dung cua
dung cong » dung trong
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
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 khien tinh - hanh ((trung cua) OR (trung tuan)) dung cong tac toan ban~.
• Adding a wildcard symbol may retrieve word variants: hoc khien tinh - hanh ((trung cua) or (trung tuan)) dung cong tac toan ban*.