Perhaps you should try some spelling variations:
mach hoc » cach hoc, dich hoc, anh hoc
khoa hoc » hoa hoc
phan van » pham van, thanh van, luan van
te mach » ke mach, te sach, tim mach
hoi cap » hoi dap, hoi cac, hoi cau
han van » nhan van, hanh van, tan van
mo hoc » mon hoc, co hoc
hoc da » hoc dan, hoc dai, hoc dat
ma hoi » mai hoi, xa hoi, ma hoa

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "te mach hoc tap, nghien cuu mo hoc da khoa hoc ma hoi cap ((han van) OR (phan van))~".
• Adding a wildcard symbol may retrieve word variants: te mach hoc tap, nghien cuu mo hoc da khoa hoc ma hoi cap ((han van) OR (phan van))*.