Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
cau tren » cu tren, dau tren, ca tren
thanh vi » hanh vi, thanh va, thanh ve
va cham » va chat, va tham
sach ty » sach y, sach tu, sach thu
xuc ban » duc ban, cuc ban, quoc ban
cao hoi » cau hoi, co hoi, cao hoc
ty nang » ky nang, ty xang, ty hang
so sach » so sanh, bo sach, co sach
va cam » va cac, va cao, va cai
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: so sach ty nang cao hoi. lieu ((va cam) OR (va cham)) xuc ban thanh vi ((cua te) or (cau tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ty nang cao hoi. lieu ((va cam) OR (va cham)) xuc ban thanh vi ((cua te) OR (cau tren))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ty nang cao hoi. lieu ((va cam) OR (va cham)) xuc ban thanh vi ((cua te) or (cau tren))*".