Perhaps you should try some spelling variations:
khanh hoa » thanh hoa, hang hoa
mach hoc » cach hoc, dich hoc, anh hoc
cuu dong » cuu cong, cuu tong, cuu long
dong hoc » dong co, dong luc
van phan » van phong, van thanh, luan phan
phan van » pham van, thanh van, luan van
te mach » ke mach, te sach, tim mach
hoi van » hoi va, hoi dan, hai van
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: te mach hoc tap, nghien cuu dong hoc ((thanh cong) or (khanh hoa)) hoc xa hoi van phan van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te mach hoc tap, nghien cuu dong hoc ((thanh cong) OR (khanh hoa)) hoc xa hoi van phan van.
• Adding a wildcard symbol may retrieve word variants: te mach hoc tap, nghien cuu dong hoc ((thanh cong) or (khanh hoa)) hoc xa hoi van phan van*.