Perhaps you should try some spelling variations:
nghien thu » nghiem thuc, nghiep thuc, nghien cuu
nganh khoa » nganh hoa, nganh khong, doanh khoa
hoc nganh » hoc nhanh
phan dang » phan dau, phan cong, nhan dan
thu sach » thuat sach, thuoc sach, thu hoach
cong hoc » dong hoc, cong hoa, cong coc
khoa hoc » hoa hoc
tu sach » su sach, te sach, tu cach
va phan » van phan, va phat, va phap
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: ((tu sach) or (thu sach)) hoc tap, nghien thu cong hoc nganh khoa hoc xa hoi va phan dang~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) hoc tap, nghien thu cong hoc nganh khoa hoc xa hoi va phan dang.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thu sach)) hoc tap, nghien thu cong hoc nganh khoa hoc xa hoi va phan dang*.