Perhaps you should try some spelling variations:
toc dich » goc dich, hoc dich, toc kinh
dich hoc » sinh hoc, hinh hoc, tinh hoc
khoa hoc » hoa hoc
nhan tai » hang tai, van tai, toan tai
cuu mot » cua mot, cuu mo, huu mot
hoc tan » hoc tang, hoc tai, hoc can
va nhan » van nhan, ca nhan, va phan
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 dich hoc tap, nghien cuu mot ((hoc tan) OR (hoc dan)) khoa hoc xa hoi va nhan tai~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc dich hoc tap, nghien cuu mot ((hoc tan) OR (hoc dan)) khoa hoc xa hoi va nhan tai".
• Adding a wildcard symbol may retrieve word variants: toc dich hoc tap, nghien cuu mot ((hoc tan) OR (hoc dan)) khoa hoc xa hoi va nhan tai*.