Perhaps you should try some spelling variations:
hieu va » hieu qua
cac xuc » cam xuc, cac nuoc, chat xuc
nang xa » nang x, lang xa, nang ma
danh co » danh cho, doanh co, anh co
tang ma » mang may, tang van
va danh » va dinh, va dan, va hanh
co cua » con cua, ca cua, cong cua
xuc va » duc va, tuc va, luc va
tu san » thu san, tu ban, tu can
san ky » sang ky, van ky, dan ky
cua su » qua su

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu san ky ((nang xa) or (tang ma)) hoi. ((hieu va) OR (lieu va)) cac xuc va danh co cua su~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu san ky ((nang xa) OR (tang ma)) hoi. ((hieu va) OR (lieu va)) cac xuc va danh co cua su.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu san ky ((nang xa) or (tang ma)) hoi. ((hieu va) OR (lieu va)) cac xuc va danh co cua su".
• Adding a wildcard symbol may retrieve word variants: tu san ky ((nang xa) or (tang ma)) hoi. ((hieu va) OR (lieu va)) cac xuc va danh co cua su*.