Perhaps you should try some spelling variations:
can thuc » van thuc, cay thuc, san thuc
dan thuc » dan toc, am thuc
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
va hanh » van hanh, va thanh, va danh
hanh di » hanh vi, hanh de, hang di
san ky » sang ky, van ky, ban ky
dan ky » van ky
di cua » dai cua, doi cua, de cua
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: nuoc ((san ky) OR (dan ky)) nang xa hoi. hieu va ((can thuc) or (dan thuc)) va hanh di cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: nuoc ((san ky) OR (dan ky)) nang xa hoi. hieu va ((can thuc) OR (dan thuc)) va hanh di cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "nuoc ((san ky) OR (dan ky)) nang xa hoi. hieu va ((can thuc) or (dan thuc)) va hanh di cua te".
• Adding a wildcard symbol may retrieve word variants: nuoc ((san ky) OR (dan ky)) nang xa hoi. hieu va ((can thuc) or (dan thuc)) va hanh di cua te*.