Perhaps you should try some spelling variations:
thanh de » hanh de, thanh ve, thanh do
su sach » so sach, vu sach
lang xa » lang ha, dang xay, lang van
hieu ve » hieu va, hieu van
dua ban » dia ban, cua ban, qua ban
duc van » duc va, duc manh, duc phan
cua tre » cua te, cuu tre, cua triet
y lang » o lang, _ lang, tay lang
ve cac » va cac, vien cac
de cua » le cua, te cua, dieu cua

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 y lang xa hoi. hieu ve cac ((((duc tan) or (dua ban))) or (duc van)) thanh de cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y lang xa hoi. hieu ve cac ((((duc tan) OR (dua ban))) OR (duc van)) thanh de cua tre.
• Adding a wildcard symbol may retrieve word variants: su sach y lang xa hoi. hieu ve cac ((((duc tan) or (dua ban))) or (duc van)) thanh de cua tre*.