Perhaps you should try some spelling variations:
luan chung » luan chinh
hieu manh » chieu xanh, hieu nganh, dieu hanh
tinh bang » tinh sang, tinh lang, tinh quang
hoc hieu » hoc thieu, hoc hien, doc hieu
van hung » manh hung, van duong, van dong
van dung » van dong, xay dung, tin dung
cong tan » cong tac, cong san, cong thanh
tan toan » tan tran, tap toan, van toan
toan cao » toan ban, toan tap

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 hieu manh - tinh bang ((luan chung) OR (((van hung) OR (van dung)))) cong tan toan cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hieu manh - tinh bang ((luan chung) or (((van hung) OR (van dung)))) cong tan toan cao~".
• Adding a wildcard symbol may retrieve word variants: hoc hieu manh - tinh bang ((luan chung) or (((van hung) OR (van dung)))) cong tan toan cao*.