Perhaps you should try some spelling variations:
nghien cua » nghien cuu, nghiep cua, nghiep vua
nganh khoa » nganh hoa, nganh khong, doanh khoa
hoc nganh » hoc nhanh
sach hoc » cach hoc, sach hoi, mach hoc
cong hoc » dong hoc, cong hoa, cong coc
khoa hoc » hoa hoc
phan van » thanh van, luan van, tran van
tu sach » thu sach, su sach, te sach
hai van » thai van, ha van, hai tan
hoc xa » hoc ma
xa hai » xa thai, xua hai, xa hoi

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 cua cong hoc nganh khoa hoc xa hai van ((phan van) or (pham van))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach hoc tap, nghien cua cong hoc nganh khoa hoc xa hai van ((phan van) OR (pham van)).
• Adding a wildcard symbol may retrieve word variants: tu sach hoc tap, nghien cua cong hoc nganh khoa hoc xa hai van ((phan van) or (pham van))*.