Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
hanh dai » hanh tai, hanh dao, vanh dai
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
ty lang » tay lang, ty xang, ty hang
lang xa » lang ha, dang xay, lang van
ve cham » va cham, ve chat, ve chim
vu cham » va cham, vu kham, tu cham
sac van » cac van, san van, sat van
cua tre » cua te, cuu tre, cua triet

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 ty lang xa hoi. hieu ((ve cham) or (vu cham)) sac van hanh dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty lang xa hoi. hieu ((ve cham) OR (vu cham)) sac van hanh dai cua tre.
• Adding a wildcard symbol may retrieve word variants: su sach ty lang xa hoi. hieu ((ve cham) or (vu cham)) sac van hanh dai cua tre*.