Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thanh va » thanh van, hanh va, thanh ha
qua cham » qua hai, qua cac, qua cua
tu sach » thu sach, su sach, te sach
va cham » va chat, va tham
va chua » vua chua, ca chua, va chu
duc ban » duc tan, duc van, dua ban
chua te » cua te, chua tu, chua xe
ly nang » ky nang, ly hang, ly vang
y nang » ky nang, v nang, may nang

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 ((y nang) or (ly nang)) xa hoi. hieu ((qua cham) OR (va cham)) duc ban thanh va chua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((y nang) OR (ly nang)) xa hoi. hieu ((qua cham) OR (va cham)) duc ban thanh va chua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((y nang) or (ly nang)) xa hoi. hieu ((qua cham) OR (va cham)) duc ban thanh va chua te".
• Adding a wildcard symbol may retrieve word variants: tu sach ((y nang) or (ly nang)) xa hoi. hieu ((qua cham) OR (va cham)) duc ban thanh va chua te*.