Perhaps you should try some spelling variations:
manh trung » manh tung, thanh trung, manh hung
thanh long » thanh cong, thang long, thanh huong
nam thanh » pham thanh, ban thanh, tai thanh
long manh » luong manh, long banh, duong manh
manh toan » thanh toan, anh tuan, tinh toan
hoc dieu » hoc thieu, hoc hien
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc dieu hanh - ((manh trung) or (canh tranh)) nam thanh long manh toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc dieu hanh - ((manh trung) OR (canh tranh)) nam thanh long manh toan ban.
• Adding a wildcard symbol may retrieve word variants: hoc dieu hanh - ((manh trung) or (canh tranh)) nam thanh long manh toan ban*.