Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
luan chinh » luan chi, hoan chinh, luat hinh
luan dong » luan cong, quan dong, luan nong
hoc dieu » hoc thieu
cong san » cong tac
san toan » van toan, dan toan, manh toan
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) or (hoc hien)) manh - hanh trinh ((luan dong) or (luan chinh)) cong san toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc dieu) OR (hoc hien)) manh - hanh trinh ((luan dong) OR (luan chinh)) cong san toan ban.
• Adding a wildcard symbol may retrieve word variants: ((hoc dieu) or (hoc hien)) manh - hanh trinh ((luan dong) or (luan chinh)) cong san toan ban*.