Perhaps you should try some spelling variations:
tren thuoc » trien thuoc, tren thuc, trung thuoc
thuoc sinh » hoc sinh, thu sinh, thuoc sach
khau thong » khau thuong, khap thong, khau tong
kinh thuat » ki thuat, dich thuat, ninh thuan
thuat sach » thuat lanh, thuat san
sach tren » sach tien, sach tranh
sinh hoat » sinh hoc, sinh vat
hoat khau » xuat khau, hat chau, han khau
hoc thong » hoc thuong, hoc trong, hoc hong
te sach » toc sach
tu sach » thu sach, su sach, tu cach
nha hoc » nha thuoc, khoa hoc, nha nuoc

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 tren thuoc sinh hoat khau thong ) or ( tu sach kinh thuat sach nha hoc thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( te sach tren thuoc sinh hoat khau thong ) OR ( tu sach kinh thuat sach nha hoc thong )).
• Adding a wildcard symbol may retrieve word variants: (( te sach tren thuoc sinh hoat khau thong ) or ( tu sach kinh thuat sach nha hoc thong ))*.