Perhaps you should try some spelling variations:
sach kem » hanh kem
dang xa » dang xay, lang xa, dang ha
hieu va » lieu va, hieu qua
cao cua » ca cua, co cua, cau cua
ban dan » ban hang, ban hanh, ban quan
sac ky » cac ky, sai ky
va cao » va cac, va co, va dao
dan vi » doan vi, don vi, dan va
vi cua » vai cua, di cua
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sach kem) or (sac ky)) dang xa hoi. hieu va cao cua ban dan vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach kem) OR (sac ky)) dang xa hoi. hieu va cao cua ban dan vi cua te.
• Adding a wildcard symbol may retrieve word variants: tu ((sach kem) or (sac ky)) dang xa hoi. hieu va cao cua ban dan vi cua te*.