Perhaps you should try some spelling variations:
hoc thieu » toc thieu, hoc hien
dang cong » dung cong
canh ban » can ban, canh dan, canh van
cua dang » cua cong, cua ban
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
toan cao » toan ban, toan tap
doi chi » doi khi
ban cua » ban quan

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) OR (doi chi)) xanh - canh ban cua dang cong tac toan cao~.
• Adding a wildcard symbol may retrieve word variants: ((hoc thieu) or (doi chi)) xanh - canh ban cua dang cong tac toan cao*.