Perhaps you should try some spelling variations:
thuoc cach » thuoc sach, thuc cach, truoc cach
cach tong » cach phong, cach mang, cac cong
nhiem huy » nhiem huu, nhiem thuc, nhiem cua
tang khoa » hang khoa, dang khoa, tang kha
tong tap » tuong tac, trong tan, cong tac
nhiem ky » hiem y, hieu ky, nhiem va
hoc tang » hoc bang, hoc tan, hoc tieng
khoa hoc » hoa hoc
van luan » van quan, van tuan, von luan
mot hoc » mon hoc, mo hoc, mot goc
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: thuoc cach tong tap, ((nhiem huy) OR (nhiem ky)) mot hoc tang khoa hoc xa hoi van luan van~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc cach tong tap, ((nhiem huy) OR (nhiem ky)) mot hoc tang khoa hoc xa hoi van luan van".
• Adding a wildcard symbol may retrieve word variants: thuoc cach tong tap, ((nhiem huy) OR (nhiem ky)) mot hoc tang khoa hoc xa hoi van luan van*.