Perhaps you should try some spelling variations:
trinh nghiep » trinh nghien, trinh nghe, trinh ghep
thanh tinh » thanh binh, nhanh tinh, than kinh
nghiep tu » nghiep vu, nghiep vua, nghiep cua
duy thanh » duy khanh, duc thanh, quy thanh
tinh nghe » trinh nghe, anh nghe, hanh nghe
so hanh » so danh, co hanh, do hanh
so sanh » do sanh
nghe du » nghe duc, nghe xu, nghe di
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) OR (so sanh)) trinh nghiep tu hoc ) or ( duy thanh tinh nghe du hoc ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( ((so hanh) OR (so sanh)) trinh nghiep tu hoc ) OR ( duy thanh tinh nghe du hoc )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( ((so hanh) OR (so sanh)) trinh nghiep tu hoc ) or ( duy thanh tinh nghe du hoc ))".
• Adding a wildcard symbol may retrieve word variants: (( ((so hanh) OR (so sanh)) trinh nghiep tu hoc ) or ( duy thanh tinh nghe du hoc ))*.