Perhaps you should try some spelling variations:
nhung doi » nhung don, nhung loi, nhung noi
hieu ngai » hieu nganh, hiem ngan, khieu nai
toc bach » truc bach, trac bach, thi bach
hoc hieu » hoc thieu, hoc hien, doc hieu
doi luoc » doi cuoc, dai luoc, tom luoc
ngai cua » ngan cua, nghi cua, nghia cua
khoa hoc » hoa hoc
hoc sach » hoc sinh, hoc cac, hoc anh
toc sach » doc sach, thuoc sach, nuoc sach
luoc vi » luoc va, luoc ve, luoc vu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((toc bach) or (((toc sach) or (hoc sach)))) khoa hoc hieu ngai cua ets : nhung doi luoc vi đai~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc bach) OR (((toc sach) OR (hoc sach)))) khoa hoc hieu ngai cua ets : nhung doi luoc vi đai.
• Adding a wildcard symbol may retrieve word variants: ((toc bach) or (((toc sach) or (hoc sach)))) khoa hoc hieu ngai cua ets : nhung doi luoc vi đai*.