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
huu mot » cuu mot, huy mot, hieu mot
mot hoc » mon hoc, mo hoc, mot goc
va phan » van phan, va phat, va phap
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 mot hoc nganh khoa hoc xa hoi va phan van~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thuat mach) OR (thuat tach)) hoc tap, nghien huu mot 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 mot hoc nganh khoa hoc xa hoi va phan van*.