Perhaps you should try some spelling variations:
hieu suat » hieu luat, hieu qua
mang lai » mang lam, mang luoi, dang loai
hieu sau » hieu su, tieu su, hieu va
ky mang » ky nang, ke mang, ky dang
lai roi » lai hoi, loi roi
dinh vi » dinh ve, dinh viet, dinh tri
danh vi » hanh vi, danh di, danh va
tu san » thu san, tu ban, tu can
san ky » sang ky, van ky, dan ky
cua te » cua tu
xu va » xu van, tu va, su va

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 mang lai roi. ((hieu sau) OR (hieu suat)) chao xu va ((danh vi) or (dinh vi)) cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu san ky mang lai roi. ((hieu sau) OR (hieu suat)) chao xu va ((danh vi) OR (dinh vi)) cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu san ky mang lai roi. ((hieu sau) OR (hieu suat)) chao xu va ((danh vi) or (dinh vi)) cua te".
• Adding a wildcard symbol may retrieve word variants: tu san ky mang lai roi. ((hieu sau) OR (hieu suat)) chao xu va ((danh vi) or (dinh vi)) cua te*.