Perhaps you should try some spelling variations:
ban benh » san benh, ba benh, ban banh
va cham » va chat, va tham
benh vi » benh va, benh ve, benh li
cao hoi » cau hoi, co hoi, cao hoc
xuc ban » duc ban, cuc ban, quoc ban
sach ky » sach y, sach ty, sach kem
vi cua » vai cua, di cua
cua te » cua tu
va cam » va cac, va cao, va cai
sac ky » cac ky, sai 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 (sac ky)) nang cao hoi. hieu ((va cam) OR (va cham)) xuc ban benh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (sac ky)) nang cao hoi. hieu ((va cam) OR (va cham)) xuc ban benh vi cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ky) or (sac ky)) nang cao hoi. hieu ((va cam) OR (va cham)) xuc ban benh vi cua te".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) or (sac ky)) nang cao hoi. hieu ((va cam) OR (va cham)) xuc ban benh vi cua te*.