Perhaps you should try some spelling variations:
ban hanh » ban hang
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
ban anh » ban banh, ban danh, bang anh
cau tre » cau tren, cau treo, cau tra
ty nang » ky nang, ty xang, ty hang
va cam » va cham, va cao, va cai
nang o » nang co, nang ho, nang ro
di cau » da cau, diem cau
o hai » co hai, so hai, o lai

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 nang o hai. hieu ((va cam) or (va cac)) xuc ((ban anh) or (ban hanh)) di cau tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty nang o hai. hieu ((va cam) OR (va cac)) xuc ((ban anh) OR (ban hanh)) di cau tre.
• Adding a wildcard symbol may retrieve word variants: su sach ty nang o hai. hieu ((va cam) or (va cac)) xuc ((ban anh) or (ban hanh)) di cau tre*.