Perhaps you should try some spelling variations:
thanh hai » thanh phan, thanh hoa, thanh san
su sach » so sach, vu sach
sach tu » sach thu, cach tu, sach ty
hai cua » thai cua, dai cua, hoi cua
dua ban » dia ban, cua ban, qua ban
duc ban » duc tan, duc van, duc man
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu va, hieu van
hanh va » hang va, hanh vi
hanh xa » hanh ma, hanh xu, canh xa
ve cam » ve cham, ve cac, va cam

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach tu ((hanh xa) or (hanh va)) hoi. hieu ve cam ((duc ban) or (dua ban)) thanh hai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach tu ((hanh xa) OR (hanh va)) hoi. hieu ve cam ((duc ban) OR (dua ban)) thanh hai cua tre.
• Adding a wildcard symbol may retrieve word variants: su sach tu ((hanh xa) or (hanh va)) hoi. hieu ve cam ((duc ban) or (dua ban)) thanh hai cua tre*.