Perhaps you should try some spelling variations:
nghiep thuoc » nghiem thuoc, nghiep thuc, nghiep theo
khanh hoa » thanh hoa, hang hoa
thu sach » tu sach, thuat sach, thuoc sach
sach hoc » cach hoc, sach hoi, mach hoc
dong hoc » dong co
dong luc » nang luc
khoa dan » khoa dang, hoa dan, khoa can
gian van » giang van, gian dan, gian lan
xa khoa » da khoa, bia khoa, tai khoa
hoc xa » hoc ma

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach hoc tap, nghiep thuoc ((dong hoc) OR (dong luc)) khanh hoa hoc xa khoa dan gian van~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach hoc tap, nghiep thuoc ((dong hoc) OR (dong luc)) khanh hoa hoc xa khoa dan gian van".
• Adding a wildcard symbol may retrieve word variants: thu sach hoc tap, nghiep thuoc ((dong hoc) OR (dong luc)) khanh hoa hoc xa khoa dan gian van*.