Perhaps you should try some spelling variations:
tien thuoc » trien thuoc, tin thuoc, bien thuoc
thuoc sinh » hoc sinh, thu sinh, thuoc sach
thuoc dong » thuoc dung, thuoc cong, thuoc dang
sach tien » sach tren, sach thieu
sinh hoat » sinh hoc, sinh vat
pho thong » he thong
thu thuoc » tu thuoc, thu thuc, tru thuoc
dong khoa » duong khoa, dung khoa, dong hoa
hoat pho » hoat ho, hoc pho, hoa phi
sach thu » sach thue, sach thieu, sach tham
khoa pho » khoa phu, khoa khoa, khoa phau
tu sach » thu sach, su sach, tu cach
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: (( tu sach tien thuoc sinh hoat pho thong ) OR ( te sach thu thuoc dong khoa pho thong ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( tu sach tien thuoc sinh hoat pho thong ) OR ( te sach thu thuoc dong khoa pho thong ))".
• Adding a wildcard symbol may retrieve word variants: (( tu sach tien thuoc sinh hoat pho thong ) OR ( te sach thu thuoc dong khoa pho thong ))*.