Perhaps you should try some spelling variations:
nghien huu » nghien cuu, nguyen huu, nhiem huu
toc hinh » toc kinh, hoc hinh, toc xinh
hinh hoc » sinh hoc, tin hoc, benh hoc
hoc cang » hoc cong, hoc bang, hoc tang
khoa hoc » hoa hoc
phan dan » phan dang, phan dau, nhan dan
huu mot » cuu mot, huy mot, hieu mot
hoc can » hoc dan, hoc cao, hoc cac
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: toc hinh hoc tap, nghien huu mot ((hoc can) or (hoc cang)) khoa hoc xa hoi va phan dan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc hinh hoc tap, nghien huu mot ((hoc can) OR (hoc cang)) khoa hoc xa hoi va phan dan.
• Adding a wildcard symbol may retrieve word variants: toc hinh hoc tap, nghien huu mot ((hoc can) or (hoc cang)) khoa hoc xa hoi va phan dan*.