Perhaps you should try some spelling variations:
va thanh » gia thanh, ban thanh, va tinh
cam thuc » am thuc, nam thuc, cam thu
nang xa » nang x, lang xa, nang ma
hieu ve » hieu van
hieu va » lieu va, hieu qua
thuc va » thuc vat, thuc dan, thuc day
di cua » dai cua, doi cua, de cua
vi cua » vai cua
so sac » so sach, so dac
sac ky » cac ky, sai ky

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sac ky nang xa hoi. ((hieu ve) OR (hieu va)) cam thuc va thanh ((vi cua) or (di cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sac ky nang xa hoi. ((hieu ve) OR (hieu va)) cam thuc va thanh ((vi cua) OR (di cua)) tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sac ky nang xa hoi. ((hieu ve) OR (hieu va)) cam thuc va thanh ((vi cua) or (di cua)) tre*".