Perhaps you should try some spelling variations:
khanh hoa » thanh hoa, hang hoa
cach hoc » cach thuc, cach thoi, dich hoc
cong coc » cong cuoc, cong cac, cong co
gian dan » gian lang
tu cach » tu cac
cong ho » cong hoa, cong cho, cong hon
va gian » va gianh, van gian, va giai
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: tu cach hoc tap, nghien cuu ((cong ho) or (cong coc)) khanh hoa hoc xa hoi va gian dan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cach hoc tap, nghien cuu ((cong ho) OR (cong coc)) khanh hoa hoc xa hoi va gian dan.
• Adding a wildcard symbol may retrieve word variants: tu cach hoc tap, nghien cuu ((cong ho) or (cong coc)) khanh hoa hoc xa hoi va gian dan*.