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