Perhaps you should try some spelling variations:
nghien huu » nghien cuu, nguyen huu, nhiem huu
nganh cong » nhanh chong, thanh cong
hoc nganh » hoc nhanh
thu sach » tu sach, thuat sach, thuoc sach
sach hoc » cach hoc, sach hoi, mach hoc
cong hoc » dong hoc, cong hoa, cong coc
huu mot » cuu mot, huy mot, hieu mot
mot hoc » mon hoc, mo hoc, mot goc
va phan » van phan, va phat, hoa phan
va phap » va phat, ban phap
ma hoi » mai hoi, xa hoi, ma hoa

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 huu mot hoc nganh cong hoc ma hoi ((va phan) or (va phap)) dan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach hoc tap, nghien huu mot hoc nganh cong hoc ma hoi ((va phan) OR (va phap)) dan.
• Adding a wildcard symbol may retrieve word variants: thu sach hoc tap, nghien huu mot hoc nganh cong hoc ma hoi ((va phan) or (va phap)) dan*.