Perhaps you should try some spelling variations:
day thanh » dao thanh, dat thanh, da thanh
thu sach » tu sach, thuat sach, thuoc sach
thanh vi » hanh vi, thanh va, thanh ve
thuc day » thuc dan, thuc vat
cac thuc » cach thuc, cac thu, can thuc
dang xay » van xay
hieu van » hieu va, thien van, lieu va
dang van » hoang van, hang va
van cac » van hac, van cau, van bac
te sach » toc sach
vi cua » vai cua, di cua
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((thu sach) or (te sach)) ky ((dang xay) or (dang van)) hoi. hieu van cac thuc day thanh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (te sach)) ky ((dang xay) OR (dang van)) hoi. hieu van cac thuc day thanh vi cua te.
• Adding a wildcard symbol may retrieve word variants: ((thu sach) or (te sach)) ky ((dang xay) or (dang van)) hoi. hieu van cac thuc day thanh vi cua te*.