Perhaps you should try some spelling variations:
hanh tai » thanh tai, hang tai, han tai
hieu ve » hieu va, hieu van
tai cua » thai cua, tai cuc, tri cua
duc van » duc va, duc manh, duc phan
ve cham » va cham, ve chat, vu cham
cua tre » cua te, cuu tre, cua triet
tang ma » mang may, tang van
bai ky » ban ky, sai ky, dai ky
ma hoi » mai hoi, xa hoi, ma hoa
bac ky » cac ky, ban ky, sac ky

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

• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((bai ky) OR (bac ky)) tang ma hoi. hieu ve cham ((duc van) OR (duc tan)) hanh tai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((bai ky) OR (bac ky)) tang ma hoi. hieu ve cham ((duc van) or (duc tan)) hanh tai cua tre~".
• Adding a wildcard symbol may retrieve word variants: tu ((bai ky) OR (bac ky)) tang ma hoi. hieu ve cham ((duc van) or (duc tan)) hanh tai cua tre*.