Perhaps you should try some spelling variations:
thanh dai » thanh hai, thanh tai, thanh dat
te sach » toc sach
cac ban » cac dan, cac van, can ban
cuc ban » cua ban, cuu ban, duc ban
sach ty » sach y, sach tu, sach thu
hieu va » lieu va
hang xa » hoang xa, hang va, hang ca
ty hang » ly hang, ty xang, thi hang
cua te » cua tu

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

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