Perhaps you should try some spelling variations:
thanh than » thanh thanh, thanh thang, thanh toan
hieu van » hieu va, thien van, lieu va
than cua » nhan cua, thai cua, ban cua
sach ky » sac ky, sach y, sach kem
sach ty » sach y, sach tu, sach thu
lang xa » lang ha, dang xay, lang van
van bac » van ban, van bao, van hac
xuc gia » duc gia, luc gia, tuc gia
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 ky) or (sach ty)) lang xa hoi. hieu van bac xuc gia thanh than cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach ky) OR (sach ty)) lang xa hoi. hieu van bac xuc gia thanh than cua tre.
• Adding a wildcard symbol may retrieve word variants: su ((sach ky) or (sach ty)) lang xa hoi. hieu van bac xuc gia thanh than cua tre*.