Perhaps you should try some spelling variations:
thuat mach » thuat sach, thuat tach, thuyet mach
mach hoc » cach hoc, dich hoc, anh hoc
cuu cong » cua cong, thu cong, cac cong
cong hoc » dong hoc, cong hoa, cong coc
hoi danh » hop danh, hoi dan, hoc danh
nhan tai » hang tai, toan tai
hoc anh » hoc nganh, hoc nhanh, ngoc anh
anh hoa » anh khoa, danh hoa, hanh hoa
van tai » von tai, van tuan
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: thuat mach hoc tap, nghien cuu cong hoc anh hoa hoc xa hoi danh ((nhan tai) OR (van tai))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat mach hoc tap, nghien cuu cong hoc anh hoa hoc xa hoi danh ((nhan tai) OR (van tai))".
• Adding a wildcard symbol may retrieve word variants: thuat mach hoc tap, nghien cuu cong hoc anh hoa hoc xa hoi danh ((nhan tai) OR (van tai))*.