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
nha thuoc » nha nuoc, nhan thuc, nha hoc
dong khoa » duong khoa, dung khoa, dong hoa
vu sach » vu bach, su sach, vu khach
hoat he » hoa he, hoat ho, thuat he
te sach » toc sach
khoa he » hoa he, khoa hoc, khong he

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( vu sach tien thuoc sinh hoat he thong ) or ( te sach nha thuoc dong khoa he thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( vu sach tien thuoc sinh hoat he thong ) OR ( te sach nha thuoc dong khoa he thong )).
• Adding a wildcard symbol may retrieve word variants: (( vu sach tien thuoc sinh hoat he thong ) or ( te sach nha thuoc dong khoa he thong ))*.