Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
hieu manh » chieu xanh, hieu nganh, dieu hanh
cua thong » cua thuong, cua khong, cua tong
hua khong » hoa khong, cua khong, hoac khong
hoc hieu » hoc thieu, hoc hien, doc hieu
dong von » dung von, dong co, dong hoc
toan ban » van ban

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 - hanh trinh ((cua thong) OR (hua khong)) dong von ((toan tap) OR (toan ban))~.
• Adding a wildcard symbol may retrieve word variants: hoc hieu manh - hanh trinh ((cua thong) or (hua khong)) dong von ((toan tap) or (toan ban))*.