Perhaps you should try some spelling variations:
khanh hoa » thanh hoa, hang hoa
cach hoc » cach thuc, cach thoi, dich hoc
dong hoc » dong co
dong luc » nang luc
nhan tai » hang tai, van tai, toan tai
tu cach » tu cac
hoc xa » hoc ma
hoi ca » hoi cua, hoi cac, hoi cau

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 ((dong hoc) or (dong luc)) khanh hoa hoc xa hoi ca nhan tai~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cach hoc tap, nghien cuu ((dong hoc) OR (dong luc)) khanh hoa hoc xa hoi ca nhan tai.
• Adding a wildcard symbol may retrieve word variants: tu cach hoc tap, nghien cuu ((dong hoc) or (dong luc)) khanh hoa hoc xa hoi ca nhan tai*.