Perhaps you should try some spelling variations:
xay hanh » day nhanh, day thanh, xanh hanh
hieu va » lieu va, hieu qua
te sac » te sach, te cac, te san
sac ky » cac ky, sai ky
va dam » van dam, va dao, va dau
dam tu » nam tu, cam tu, tam tu
va cuu » va chu, va huu
va cau » van cau, va cac, va dau

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sac ky nang x ho. hieu va dam tu xay hanh ((va cuu) or (va cau)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky nang x ho. hieu va dam tu xay hanh ((va cuu) OR (va cau)) tre.
• Adding a wildcard symbol may retrieve word variants: te sac ky nang x ho. hieu va dam tu xay hanh ((va cuu) or (va cau)) tre*.