Perhaps you should try some spelling variations:
thieu quan » thieu quang, thien quan, hieu quan
thanh tung » thanh cong
hoc thieu » toc thieu, hoc hien
dang cong » dung cong
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
toan tap » toan ban
va dang » van dang, va nang, va lang

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thieu quan - ((thanh trung) or (thanh tung)) va dang cong tac toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu quan - ((thanh trung) OR (thanh tung)) va dang cong tac toan tap.
• Adding a wildcard symbol may retrieve word variants: hoc thieu quan - ((thanh trung) or (thanh tung)) va dang cong tac toan tap*.