Perhaps you should try some spelling variations:
thuoc cach » thuoc sach, thuc cach, truoc cach
nghien huu » nghien cuu, nguyen huu, nhiem huu
mang tap » hang tap, man tap, mang tay
hoc tang » hoc bang, hoc tieng, hoc trong
khoa hoc » hoa hoc
van luan » van quan, van tuan, von luan
huu mot » cuu mot, huy mot, hieu mot
hoc tan » hoc dan, hoc tap, hoc tai
hai van » thai van, ha van, hai tan
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 mang tap, nghien huu mot ((hoc tang) OR (hoc tan)) khoa hoc xa hai van luan van~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuoc cach mang tap, nghien huu mot ((hoc tang) OR (hoc tan)) khoa hoc xa hai van luan van".
• Adding a wildcard symbol may retrieve word variants: thuoc cach mang tap, nghien huu mot ((hoc tang) OR (hoc tan)) khoa hoc xa hai van luan van*.