Perhaps you should try some spelling variations:
phau thong » phap thong, phan thong, phan thuong
thuoc sach » nuoc sach, thuat sach, thuoc sinh
khau thong » khau thuong, khap thong, khau tong
thuc bach » truc bach, thuc cach, thuc hanh
sach tai » sach bai, sach tham, sach dao
hoc sach » hoc sinh, hoc cac, hoc anh
te sach » toc sach

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

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