Perhaps you should try some spelling variations:
trinh nghien » trinh nghe, kinh nghiem, trinh thiet
kinh nghien » kinh nghiem, kinh hien
nghien noi » nghe noi, nghiep voi, nghiem moi
nghien dia » nguyen dia, nghiep di
cac trinh » cac tinh, lap trinh, cac thanh
thu sach » tu sach, thuat sach, thuoc sach
noi hoc » hoi hoc, voi hoc, noi khoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( tu cac trinh nghien noi hoc ) or ( thu sach kinh nghien dia oc ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu cac trinh nghien noi hoc ) OR ( thu sach kinh nghien dia oc )).
• Adding a wildcard symbol may retrieve word variants: (( tu cac trinh nghien noi hoc ) or ( thu sach kinh nghien dia oc ))*.