Perhaps you should try some spelling variations:
nghien huu » nghien cuu, nguyen huu, nhiem huu
tran khoa » toan khoa, san khoa, nhan khoa
hoc tran » hoc tan, hoc tren, boc tran
khoa hoc » hoa hoc
huu mot » cuu mot, huy mot, hieu mot
mot hoc » mon hoc, mo hoc, mot goc
va nhan » van nhan, ca nhan, va phan
va phap » va phat, ban phap
hoc xa » hoc ma
sinh » dinh, minh, kinh

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc sinh hoc tap, nghien huu mot hoc tran khoa hoc xa hoi ((va nhan) or (va phap)) dan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sinh hoc tap, nghien huu mot hoc tran khoa hoc xa hoi ((va nhan) OR (va phap)) dan.
• Adding a wildcard symbol may retrieve word variants: hoc sinh hoc tap, nghien huu mot hoc tran khoa hoc xa hoi ((va nhan) or (va phap)) dan*.