Perhaps you should try some spelling variations:
may thoi » gay thoi, may thi, tay thoi
hanh vai » hanh vi, hanh va, hanh tai
sach ky » sac ky, sach y, sach ty
vai cuu » vai cua
va hanh » van hanh, va thanh, va danh
cao xuc » cam xuc, cao duc, cao suc
hieu va » lieu va, hieu qua
may hoi » tay hoi, mai hoi, may hmi
cuu tre » cua tre, cau tren, cau treo
va cao » va cac, va co, va dao
xuc va » duc va, tuc va, luc va
sai ky » sac ky

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 ky) or (sai ky)) mang ((may hoi) OR (may thoi)). hieu va cao xuc va hanh vai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (sai ky)) mang ((may hoi) OR (may thoi)). hieu va cao xuc va hanh vai cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ky) or (sai ky)) mang ((may hoi) OR (may thoi)). hieu va cao xuc va hanh vai cuu tre".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) or (sai ky)) mang ((may hoi) OR (may thoi)). hieu va cao xuc va hanh vai cuu tre*.