Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
phuc van » thuc van, phuc va, chuc van
cac phuc » cau phuc, khac phuc, cach thuc
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
san ky » sang ky, van ky, ban ky
dan ky » van ky
de cua » le cua, dieu cua
te cua » tue cua, le cua
ve cac » va cac, vien cac

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

• If you are trying to use Boolean operators, they must be ALL CAPS: nuoc ((san ky) OR (dan ky)) nang xa hoi. hieu ve cac phuc van hanh ((de cua) OR (te cua)) tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "nuoc ((san ky) or (dan ky)) nang xa hoi. hieu ve cac phuc van hanh ((de cua) OR (te cua)) tre~".
• Adding a wildcard symbol may retrieve word variants: nuoc ((san ky) or (dan ky)) nang xa hoi. hieu ve cac phuc van hanh ((de cua) OR (te cua)) tre*.