Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
cam thuc » am thuc, nam thuc, cam thu
thuc dan » thuc hanh, hoc dan, thuc vat
dan hang » ban hang, van hang, dat hang
hang doi » hang di, hang loi, huong doi
so sanh » do sanh
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
hieu ve » hieu va, hieu van
doi cuu » doi cua, doi cuoc
cuu tre » cua tre, cau tren, cau treo
ve cam » ve cham, ve cac, va cam

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc sach) OR (so sanh)) ky lang xa hoi. hieu ve cam thuc dan hang doi cuu tre~.
• Adding a wildcard symbol may retrieve word variants: ((toc sach) or (so sanh)) ky lang xa hoi. hieu ve cam thuc dan hang doi cuu tre*.