Perhaps you should try some spelling variations:
mach hoc » dich hoc, anh hoc, bac hoc
cach hoc » cach thuc, cach thoi, dich hoc
tan khoa » toan khoa, tran khoa, san khoa
khoa hoc » hoa hoc
nhan dan » phan dau, gian dan, nhan tai
cuu mot » cua mot, cuu mo, huu mot
mot hoc » mon hoc, mo hoc, mot goc
hoc tan » hoc tang, hoc dan, hoc tap
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 ((mach hoc) OR (cach hoc)) tap, nghien cuu mot hoc tan khoa hoc xa hoi va nhan dan~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc ((mach hoc) OR (cach hoc)) tap, nghien cuu mot hoc tan khoa hoc xa hoi va nhan dan".
• Adding a wildcard symbol may retrieve word variants: toc ((mach hoc) OR (cach hoc)) tap, nghien cuu mot hoc tan khoa hoc xa hoi va nhan dan*.