Perhaps you should try some spelling variations:
cam tuc » cam xuc, cam tu, nam thuc
nang xa » nang x, lang xa, nang ma
hieu ve » hieu van
loai ca » loai cay, loai cua, loai va
hieu va » lieu va, hieu qua
va dao » ca dao
ca dan » cac dan, ca dao
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
ca tre » ca tren, cua tre, ca tru

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sac ky nang xa hoi. ((hieu ve) OR (hieu va)) cam tuc ((va dao) or (ca dan)) loai ca tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky nang xa hoi. ((hieu ve) OR (hieu va)) cam tuc ((va dao) OR (ca dan)) loai ca tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky nang xa hoi. ((hieu ve) OR (hieu va)) cam tuc ((va dao) or (ca dan)) loai ca tre".
• Adding a wildcard symbol may retrieve word variants: tu sac ky nang xa hoi. ((hieu ve) OR (hieu va)) cam tuc ((va dao) or (ca dan)) loai ca tre*.