Perhaps you should try some spelling variations:
khang cong » hang cong, thanh cong, phan cong
hoc thieu » toc thieu, hoc hien
hanh dang » hanh dong, anh dang, hanh dung
dang cong » dung cong
dang van » hoang van, hang va
dan toan » van toan, dan than, manh toan
toan tap » toan 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) OR (theo tieu)) xanh - hanh dang van ((khang cong) OR (dang cong)) dan toan tap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc thieu) or (theo tieu)) xanh - hanh dang van ((khang cong) OR (dang cong)) dan toan tap~".
• Adding a wildcard symbol may retrieve word variants: ((hoc thieu) or (theo tieu)) xanh - hanh dang van ((khang cong) OR (dang cong)) dan toan tap*.