Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
trinh cua » tinh cua, trinh luat, trinh quan
cua nhung » va nhung
dung manh » duong manh, dung danh, tung manh
hung manh » nhung manh, hung anh, tung manh
toan ban » van ban
do viet » dao viet, so viet, o viet
co viet » so viet, o viet, hoc viet

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((do viet) or (co viet)) tach - hanh trinh cua nhung ((dung manh) OR (hung manh)) toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((do viet) OR (co viet)) tach - hanh trinh cua nhung ((dung manh) OR (hung manh)) toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((do viet) or (co viet)) tach - hanh trinh cua nhung ((dung manh) OR (hung manh)) toan ban".
• Adding a wildcard symbol may retrieve word variants: ((do viet) or (co viet)) tach - hanh trinh cua nhung ((dung manh) OR (hung manh)) toan ban*.