Perhaps you should try some spelling variations:
thanh tung » thanh cong
hoc thieu » hoc hien
lang cong » dang cong, bang cong, hang cong
anh dung » anh dong, anh huong, sach dung
cong tac » cong ty
tac than » tac thanh, tam than, tac nhan
than cau » toan cau, phan cau, than cap
va lang » va nang, hoa lang

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 (toc thieu)) xanh - ((thanh tung) OR (anh dung)) va lang cong tac than cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc thieu) OR (toc thieu)) xanh - ((thanh tung) or (anh dung)) va lang cong tac than cau~".
• Adding a wildcard symbol may retrieve word variants: ((hoc thieu) OR (toc thieu)) xanh - ((thanh tung) or (anh dung)) va lang cong tac than cau*.