Perhaps you should try some spelling variations:
thanh dai » thanh hai, thanh tai, thanh dat
ban thanh » ban hanh, ban hang
sach dao » lanh dao
hieu van » hieu va, thien van, lieu va
sach lo » sach doi, sach hoi, sach moi
van cac » van hac, van cau, van bac
cac dac » cac dan, cac dai, cac bac
dac ban » cac ban, dac san, duc ban
cua tre » cuu tre, cua triet, dua tren
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: tu ((sach lo) OR (sach dao)) nang x ho. hieu van cac dac ban thanh dai ((cua tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach lo) OR (sach dao)) nang x ho. hieu van cac dac ban thanh dai ((cua tre) OR (cua te))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach lo) OR (sach dao)) nang x ho. hieu van cac dac ban thanh dai ((cua tre) or (cua te))*".