Perhaps you should try some spelling variations:
bac thanh » ban thanh, cac thanh, tai thanh
sach tham » sach nha
thanh tay » thanh tai, thanh toan, thanh thuy
tay thiet » tai thiet, tao thiet, toan thiet
thiet hoa » thuyet hoa, thien hoat, triet hoc
thuat do » thuat o
te sach » toc sach
tham ky » pham ky, than ky, tham my
do hoc » co hoc, do hoa, du hoc
te bac » ten bac, te bao, te ban

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 tham ky thuat do hoc ) or ( te bac thanh tay thiet hoa hoc ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( te sach tham ky thuat do hoc ) OR ( te bac thanh tay thiet hoa hoc )).
• Adding a wildcard symbol may retrieve word variants: (( te sach tham ky thuat do hoc ) or ( te bac thanh tay thiet hoa hoc ))*.