Perhaps you should try some spelling variations:
hieu van » thien van, lieu va, hieu ve
xuat vat » xuat va, xuat vac, thuat vat
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
cam luc » cam xuc, cau luc
luc ban » duc ban, cuc ban, luc bat
tu sac » tu sach, tu cac, tu san
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: tu sac ky nang xa hoi. ((hieu van) or (hieu va)) cam luc ban ((thanh hoa) OR (thanh pho)) xuat vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky nang xa hoi. ((hieu van) OR (hieu va)) cam luc ban ((thanh hoa) OR (thanh pho)) xuat vat*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky nang xa hoi. ((hieu van) or (hieu va)) cam luc ban ((thanh hoa) OR (thanh pho)) xuat vat*".