Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thanh vi » hanh vi, thanh va, thanh ve
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
dua ban » dia ban, cua ban, qua ban
ve cham » va cham, ve chat, vu cham
hang xa » hoang xa, hang va, hang ca
ty hang » ly hang, ty xang, thi hang
ve cam » ve cac, va cam, ve cai
cua tu » cua tuc, cua su, cua cu

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 hang xa hoi. hieu ((ve cam) OR (ve cham)) dua ban thanh vi ((cua te) or (cua tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty hang xa hoi. hieu ((ve cam) OR (ve cham)) dua ban thanh vi ((cua te) OR (cua tu)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty hang xa hoi. hieu ((ve cam) OR (ve cham)) dua ban thanh vi ((cua te) or (cua tu))".
• Adding a wildcard symbol may retrieve word variants: su sach ty hang xa hoi. hieu ((ve cam) OR (ve cham)) dua ban thanh vi ((cua te) or (cua tu))*.