Perhaps you should try some spelling variations:
hoc nhanh » hoc nganh, hoc phan
dinh hoc » sinh hoc, hinh hoc, tinh hoc
cuu cong » cua cong, thu cong, cac cong
ngoc anh » ngu anh
khoa hoc » hoa hoc
nhan tai » hang tai, van tai, toan tai
su dinh » vu dinh, su kinh, su hinh
va nhan » van nhan, ca nhan, va phan
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: su dinh hoc tap, nghien cuu cong ((hoc nhanh) or (ngoc anh)) khoa hoc xa hoi va nhan tai~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su dinh hoc tap, nghien cuu cong ((hoc nhanh) OR (ngoc anh)) khoa hoc xa hoi va nhan tai.
• Adding a wildcard symbol may retrieve word variants: su dinh hoc tap, nghien cuu cong ((hoc nhanh) or (ngoc anh)) khoa hoc xa hoi va nhan tai*.