Perhaps you should try some spelling variations:
thuat mach » thuat sach, thuat tach, thuyet mach
nguyen huu » nguyen duc
nganh dong » nganh cong, nhanh dong, nganh nong
mach hoc » cach hoc, dich hoc, anh hoc
dong hoc » dong co, dong luc
cau luan » cu luan, dau luan, lau luan
mot hoc » mon hoc, mo hoc, bot hoc
hoa cau » hoa cac, hoa dau, hoa mau
hoc xa » hoc ma
xa hoa » xa khoa, xa hoi, ma 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, nguyen huu ((mot hoc) or (mot goc)) nganh dong hoc xa hoa cau luan van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat mach hoc tap, nguyen huu ((mot hoc) OR (mot goc)) nganh dong hoc xa hoa cau luan van.
• Adding a wildcard symbol may retrieve word variants: thuat mach hoc tap, nguyen huu ((mot hoc) or (mot goc)) nganh dong hoc xa hoa cau luan van*.