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