Perhaps you should try some spelling variations:
thuoc cach » thuoc sach, thuc cach, truoc cach
nghien huu » nghien cuu, nguyen huu, nhiem huu
cach tong » cach phong, cach mang, cac cong
khoa hoc » hoa hoc
tan khoa » toan khoa, tran khoa, san khoa
tan luan » tang luan, toan luan, dan luan
tong tap » tuong tac, trong tan, cong tac
mot hoc » mon hoc, mot goc, bot hoc
hai tan » hai van, hai quan
mo hoc » mon hoc, co hoc
hoc xa » hoc ma
xa hai » xa thai, xua hai, xa hoi

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: thuoc cach tong tap, nghien huu ((mot hoc) OR (mo hoc)) tan khoa hoc xa hai tan luan van~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc cach tong tap, nghien huu ((mot hoc) OR (mo hoc)) tan khoa hoc xa hai tan luan van".
• Adding a wildcard symbol may retrieve word variants: thuoc cach tong tap, nghien huu ((mot hoc) OR (mo hoc)) tan khoa hoc xa hai tan luan van*.