Perhaps you should try some spelling variations:
hieu suat » hieu luat, hieu qua
mang loi » mang luoi, hang loi, tang loi
hieu sau » hieu su, tieu su, hieu va
ky mang » ky nang, ke mang, ky dang
loi roi » loi noi, lai roi, voi 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 loi 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 loi 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 loi roi. ((hieu sau) or (hieu suat)) chao xu va ((danh vi) or (dinh vi)) cua te*.