Perhaps you should try some spelling variations:
trinh nghien » trinh nghe, kinh nghiem, trinh thiet
khanh trinh » hanh trinh, thanh trinh, nhanh tinh
kinh nghiep » kinh nghiem, doanh nghiep
nghiep tu » nghiep vu, nghiep vua, nghiep cua
nghien xu » nghiem xu, nghien cuu, nghiep vu
su sach » so sach, vu sach
tu hoc » te hoc
xu hoc » du hoc, su hoc, xa hoc

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

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