Perhaps you should try some spelling variations:
khan thong » khap thong, khau thong, nhan thong
thuc bach » truc bach, thuc cach, thuoc sach
xach tay » canh tay
tay thuc » tay thu, cay thuc, day thuc
bach kho » bach khoa, bac ho, benh kho
kho khan » khoa kham, khoa than
tu thong » tu thuong, tu tuong, tu trong
thong va » thong cua, truong va, thong qua
te sach » toc sach
sach tu » sach thu, cach tu, sach ty
va khoa » vat khoa, van khoa, da khoa
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 xach tay thuc bach kho khan thong ) or ( te sach tu thong va khoa he thong ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( te xach tay thuc bach kho khan thong ) OR ( te sach tu thong va khoa he thong )).
• Adding a wildcard symbol may retrieve word variants: (( te xach tay thuc bach kho khan thong ) or ( te sach tu thong va khoa he thong ))*.