Perhaps you should try some spelling variations:
thuat mach » thuat sach, thuat tach, thuyet mach
nganh khoa » nganh hoa, nganh khong, doanh khoa
hoc nganh » hoc nhanh
van thanh » ban thanh, van tuan
thanh van » thanh san, thanh toan, thanh phan
mach hoc » cach hoc, dich hoc, anh hoc
cuu cong » cua cong, thu cong, cac cong
khoa hoc » hoa hoc
huy mot » huu mot, chua mot, huoc mot
hoi van » hoi va, hoi dan, hai van
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) or (huy mot)) hoc nganh khoa hoc xa hoi van thanh van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat mach hoc tap, nghien ((cuu cong) OR (huy mot)) hoc nganh khoa hoc xa hoi van thanh van.
• Adding a wildcard symbol may retrieve word variants: thuat mach hoc tap, nghien ((cuu cong) or (huy mot)) hoc nganh khoa hoc xa hoi van thanh van*.