Perhaps you should try some spelling variations:
nghien cac » nghiep cach, nghien cuu, nghiep cay
hoc nganh » hoc nhanh
khong hoc » thong hoc, khong thuoc, khong chuc
khung hoc » chung hoc, nhung hoc, thuong hoc
sach hoc » cach hoc, sach hoi, mach hoc
cac cong » cua cong
cong hoc » dong hoc, cong hoa, cong coc
su sach » so sach, vu sach
va phan » van phan, va phat, va phap
phan va » phan van, nhan va, han va

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 hoc tap, nghien cac cong hoc nganh ((khong hoc) or (khung hoc)) xa hoi va phan va~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach hoc tap, nghien cac cong hoc nganh ((khong hoc) OR (khung hoc)) xa hoi va phan va.
• Adding a wildcard symbol may retrieve word variants: su sach hoc tap, nghien cac cong hoc nganh ((khong hoc) or (khung hoc)) xa hoi va phan va*.