Perhaps you should try some spelling variations:
trinh nghien » trinh nghe, kinh nghiem, trinh thiet
hanh trinh » canh tranh, hanh chinh
trinh ghep » trinh nghe, trinh phap, trinh nhap
trinh he » trinh han, trinh hoa, trinh thi
so hanh » so sanh, so danh, co hanh
ghep tu » nghiep tu, ghep tuoi
tu hoc » te hoc
du hoc » duoc hoc

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( so hanh trinh ghep tu hoc ) or ( duy khanh ((trinh nghien) or (trinh he)) du hoc ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( so hanh trinh ghep tu hoc ) OR ( duy khanh ((trinh nghien) OR (trinh he)) du hoc )).
• Adding a wildcard symbol may retrieve word variants: (( so hanh trinh ghep tu hoc ) or ( duy khanh ((trinh nghien) or (trinh he)) du hoc ))*.