Perhaps you should try some spelling variations:
cap thuc » can thuc, cay thuc, phap thuc
danh dai » danh dau, danh di, danh sai
hieu cao » chieu cao, hieu cac, hieu ca
tap thuc » tap tuc, tam thuc, toan thuc
dai cuu » dai cua, dai huu
va danh » va dinh, va dan, va hanh
cuu tre » cua tre, cau tren, cau treo
sach ky » sac ky, sach ty, sach kem
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: thu ((sach ky) or (sach y)) nang x hoi. hieu cao ((cap thuc) OR (tap thuc)) va danh dai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu ((sach ky) OR (sach y)) nang x hoi. hieu cao ((cap thuc) OR (tap thuc)) va danh dai cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu ((sach ky) or (sach y)) nang x hoi. hieu cao ((cap thuc) OR (tap thuc)) va danh dai cuu tre".
• Adding a wildcard symbol may retrieve word variants: thu ((sach ky) or (sach y)) nang x hoi. hieu cao ((cap thuc) OR (tap thuc)) va danh dai cuu tre*.