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

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. hieu va cao tuc 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. hieu va cao tuc va hanh vai cuu tre.
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) or (sai ky)) mang may hoi. hieu va cao tuc va hanh vai cuu tre*.