Perhaps you should try some spelling variations:
sinh hoat » sinh hoc, sinh vat
sinh khoa » sinh hoc, anh khoa
sach tri » sach tai, sach tren, sach truc
hoat pho » hoat ho, hoc pho, hoa phi
te sach » toc sach
tri hoc » triet hoc, tri thuc, thai hoc
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: (( te sach tri hoc sinh hoat pho thong ) or ( te sach tri hoc sinh khoa he thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( te sach tri hoc sinh hoat pho thong ) OR ( te sach tri hoc sinh khoa he thong )).
• Adding a wildcard symbol may retrieve word variants: (( te sach tri hoc sinh hoat pho thong ) or ( te sach tri hoc sinh khoa he thong ))*.