Perhaps you should try some spelling variations:
nganh khong » nganh cong, nhanh chong, nganh nong
hoc nganh » hoc nhanh
thu sach » tu sach, thuat sach, thuoc sach
sach hoc » cach hoc, sach hoi, mach 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
hoi van » hoi va, hoi dan, hai van

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach hoc tap, nghien cuu dong hoc nganh khong ((hoc xa) OR (hoc ma)) hoi van phan van~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach hoc tap, nghien cuu dong hoc nganh khong ((hoc xa) OR (hoc ma)) hoi van phan van".
• Adding a wildcard symbol may retrieve word variants: thu sach hoc tap, nghien cuu dong hoc nganh khong ((hoc xa) OR (hoc ma)) hoi van phan van*.