Perhaps you should try some spelling variations:
thuoc sach » hoc sach, thuat sach, thuoc sinh
khoa thuoc » khong thuoc, khoa hoc, nha thuoc
nuoc sach » nguoi sach, hoc sach, cuoc cach
thieu chi » thieu nhi, hieu chi, tieu chi
nhung bi » nhung bai, nhung gi
hoa toc » hoa hoc, ho toc, hoa doc
chi cua » chi cuc, khi cua, cuoi cua
bi duoc » bo duoc, bien duoc, ban duoc
duoc li » duoc si, duoc ly, duoc lieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((thuoc sach) OR (nuoc sach)) ((hoa toc) or (khoa thuoc)) thieu chi cua ets : nhung bi duoc li đai~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thuoc sach) OR (nuoc sach)) ((hoa toc) OR (khoa thuoc)) thieu chi cua ets : nhung bi duoc li đai.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thuoc sach) OR (nuoc sach)) ((hoa toc) or (khoa thuoc)) thieu chi cua ets : nhung bi duoc li đai".
• Adding a wildcard symbol may retrieve word variants: ((thuoc sach) OR (nuoc sach)) ((hoa toc) or (khoa thuoc)) thieu chi cua ets : nhung bi duoc li đai*.