Perhaps you should try some spelling variations:
thuat mach » thuat sach, thuat tach, thuyet mach
nghien huu » nghien cuu, nguyen huu, nhiem huu
hoc thanh » hoc nhanh, hoan thanh, hoc phan
thanh hoa » thanh pho
mach hoc » cach hoc, dich hoc, anh hoc
tung hoc » trung hoc, tuong hoc, dung hoc
hoc danh » hoc dan, hoc anh, hoc hanh
nhan tai » hang tai, toan tai
van tai » von tai, van tuan
hoc xa » hoc ma
xa hoc » xa hoi, va hoc, xa hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuat mach hoc tap, nghien huu tung hoc thanh hoa hoc xa hoc danh ((nhan tai) OR (van tai))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat mach hoc tap, nghien huu tung hoc thanh hoa hoc xa hoc danh ((nhan tai) OR (van tai))".
• Adding a wildcard symbol may retrieve word variants: thuat mach hoc tap, nghien huu tung hoc thanh hoa hoc xa hoc danh ((nhan tai) OR (van tai))*.