Perhaps you should try some spelling variations:
khap thong » phap thong, khau thong, khac thuong
thuoc sach » hoc sach, nuoc sach, thuat sach
thuoc ban » thuoc tan, thuoc dang, thu ban
khoa khap » khoa kham, khoa khac, kho khan
sach bai » cac bai
sach dao » lanh dao
sach xa » sach nha

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

• Performing a fuzzy search may retrieve terms with similar spellings: nuoc ((sach bai) or (((sach xa) OR (sach dao)))) ((thuoc sach) or (thuoc ban)) khoa khap thong~.
• If you are trying to use Boolean operators, they must be ALL CAPS: nuoc ((sach bai) OR (((sach xa) OR (sach dao)))) ((thuoc sach) OR (thuoc ban)) khoa khap thong.
• The words AND, OR and NOT may confuse the search; try adding quotes: "nuoc ((sach bai) or (((sach xa) OR (sach dao)))) ((thuoc sach) or (thuoc ban)) khoa khap thong".
• Adding a wildcard symbol may retrieve word variants: nuoc ((sach bai) or (((sach xa) OR (sach dao)))) ((thuoc sach) or (thuoc ban)) khoa khap thong*.