Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thanh le » thinh le, thanh ve, thanh de
sach thu » sach thue, sach thieu, sach tham
duc ban » duc tan, duc van, dua ban
cam duc » cam xuc, cao duc, pham duc
hieu ve » hieu va, hieu van
lang xa » lang ha, dang xay, lang van
sach ty » sach y, xach tay, sach hay
sach tu » cach tu, sach uu, sach xu
ve cam » ve cham, ve cac, va cam
le cua » ly cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sach ty) or (((sach tu) OR (sach thu)))) lang xa hoi. hieu ve cam duc ban thanh le cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ty) OR (((sach tu) OR (sach thu)))) lang xa hoi. hieu ve cam duc ban thanh le cua vat.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ty) or (((sach tu) OR (sach thu)))) lang xa hoi. hieu ve cam duc ban thanh le cua vat".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ty) or (((sach tu) OR (sach thu)))) lang xa hoi. hieu ve cam duc ban thanh le cua vat*.