Perhaps you should try some spelling variations:
thuat mach » thuat sach, thuyet mach, thuat lanh
thuat tach » thuat sach, thuat tac, thuat thanh
nghien huu » nghien cuu, nguyen huu, nhiem huu
nganh khoa » nganh hoa, nganh khong, doanh khoa
hoc nganh » hoc nhanh
khoa hoc » hoa hoc
phan van » pham van, thanh van, luan van
va phan » van phan, va phat, va phap
huu mo » huu mot, huu co, huu ho
mo hoc » mon hoc, co hoc
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) or (thuat tach)) hoc tap, nghien huu mo hoc nganh khoa hoc xa hoi va phan van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thuat mach) OR (thuat tach)) hoc tap, nghien huu mo hoc nganh khoa hoc xa hoi va phan van.
• Adding a wildcard symbol may retrieve word variants: ((thuat mach) or (thuat tach)) hoc tap, nghien huu mo hoc nganh khoa hoc xa hoi va phan van*.