Perhaps you should try some spelling variations:
khanh tinh » nhanh tinh, thanh tinh, khanh linh
nghiem tu » nghiep tu, nghiem su, nghiem te
tinh nghe » trinh nghe, anh nghe, hanh nghe
su sach » so sach, vu sach
nghe so » nghe son, nghe co, nghiep so
tu hoc » te hoc
so hoc » co hoc, mo hoc, so hoa
kinh » dinh, minh

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 nghiem tu hoc ) or ( duy khanh tinh nghe so hoc ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( su sach kinh nghiem tu hoc ) OR ( duy khanh tinh nghe so hoc )).
• Adding a wildcard symbol may retrieve word variants: (( su sach kinh nghiem tu hoc ) or ( duy khanh tinh nghe so hoc ))*.