Perhaps you should try some spelling variations:
khanh hoa » thanh hoa, hang hoa
thu cach » thuc cach, thu canh, tu cach
cach hoc » cach thuc, cach thoi, dich hoc
nhan dan » phan dau, gian dan, nhan tai
duong o » duong co, duong _, duong loi
dong o » dong co, dong ho, dong y
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: thu cach hoc tap, nghien cuu ((dong o) or (duong o)) khanh hoa hoc xa hoi ca nhan dan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu cach hoc tap, nghien cuu ((dong o) OR (duong o)) khanh hoa hoc xa hoi ca nhan dan.
• Adding a wildcard symbol may retrieve word variants: thu cach hoc tap, nghien cuu ((dong o) or (duong o)) khanh hoa hoc xa hoi ca nhan dan*.