Perhaps you should try some spelling variations:
thanh hai » thanh phan, thanh hoa, thanh san
cau theo » cau thi, cau tao
cac thuc » cach thuc, cac thu, can thuc
va thanh » gia thanh, ban thanh, va tinh
cua tre » cua te, cuu tre, cua triet
thuc va » thuc vat, thuc dan, thuc day
sach ty » sach y, sach thu, xach tay
hieu ve » hieu va, hieu van
sach tu » sach thu, cach tu, sach uu
ve cac » va cac, vien cac
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: tu ((sach ty) OR (sach tu)) nang x hoi. hieu ve cac thuc va thanh hai ((cua tre) or (cau theo))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ty) OR (sach tu)) nang x hoi. hieu ve cac thuc va thanh hai ((cua tre) OR (cau theo)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ty) OR (sach tu)) nang x hoi. hieu ve cac thuc va thanh hai ((cua tre) or (cau theo))".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ty) OR (sach tu)) nang x hoi. hieu ve cac thuc va thanh hai ((cua tre) or (cau theo))*.