Perhaps you should try some spelling variations:
tinh lang » dinh lang, tinh sang, tinh bang
luan hung » luan chung, luan ung, tuan hung
hoc dieu » hoc thieu, hoc hien
lan hung » van hung, luan chung, lan phuong
cong tac » cong ty
tac tran » tan tran, tac trai, tac tren
tran cao » toan cao, tran chau, trang cho

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 dieu hanh - tinh lang ((luan hung) OR (lan hung)) cong tac tran cao~.
• Adding a wildcard symbol may retrieve word variants: hoc dieu hanh - tinh lang ((luan hung) or (lan hung)) cong tac tran cao*.