Perhaps you should try some spelling variations:
hoc thanh » hoan thanh, hoc phan, ha thanh
hoc nhanh » hoc nganh, hoc phan
sach mai » bach mai, sach bai, sach mau
cuu cong » cua cong, thu cong, cac cong
nhan van » nhan dan, nhan va, phan van
su sach » so sach, vu sach
mai tap » bai tap, mai tat, mai tan
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 sach mai tap, nghien cuu cong ((hoc thanh) or (hoc nhanh)) hoa hoc xa hoi va nhan van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach mai tap, nghien cuu cong ((hoc thanh) OR (hoc nhanh)) hoa hoc xa hoi va nhan van.
• Adding a wildcard symbol may retrieve word variants: su sach mai tap, nghien cuu cong ((hoc thanh) or (hoc nhanh)) hoa hoc xa hoi va nhan van*.