Perhaps you should try some spelling variations:
cau thuc » cau truc, cuu thuc, can thuc
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
van anh » van thanh, tuan anh, van minh
cuu tre » cua tre, cau tren, cau treo
gac ky » cac ky, bac ky
sac ky » cac ky, sai ky
ve cau » ke cau, va cau, ve cac
de cuu » de cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: nuoc ((gac ky) OR (sac ky)) nang xa hoi. hieu ve cau thuc ((van ban) or (van anh)) de cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: nuoc ((gac ky) OR (sac ky)) nang xa hoi. hieu ve cau thuc ((van ban) OR (van anh)) de cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "nuoc ((gac ky) OR (sac ky)) nang xa hoi. hieu ve cau thuc ((van ban) or (van anh)) de cuu tre".
• Adding a wildcard symbol may retrieve word variants: nuoc ((gac ky) OR (sac ky)) nang xa hoi. hieu ve cau thuc ((van ban) or (van anh)) de cuu tre*.