Perhaps you should try some spelling variations:
dao thanh » ban thanh, tro thanh, de thanh
cam thuc » am thuc, nam thuc, cam thu
dac nhan » cac nhan, danh nhan, ca nhan
cua tre » cua te, cuu tre, cua triet
sach ky » sac ky, sach ty, sach kem
va cam » va cham, va cac, va cao
di cua » dai cua, doi cua, de cua
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu ((sach ky) OR (sach y)) nang x hoi. lieu va cam thuc ((dao thanh) or (dac nhan)) di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu ((sach ky) OR (sach y)) nang x hoi. lieu va cam thuc ((dao thanh) OR (dac nhan)) di cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu ((sach ky) OR (sach y)) nang x hoi. lieu va cam thuc ((dao thanh) or (dac nhan)) di cua tre".
• Adding a wildcard symbol may retrieve word variants: vu ((sach ky) OR (sach y)) nang x hoi. lieu va cam thuc ((dao thanh) or (dac nhan)) di cua tre*.