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
tu sach » thu sach, su sach, te 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: tu sach hoc tap, nghien cac cong hoc nganh ((khong hoc) OR (khung hoc)) xa hoi va phan va~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu 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: tu sach hoc tap, nghien cac cong hoc nganh ((khong hoc) OR (khung hoc)) xa hoi va phan va*.