Perhaps you should try some spelling variations:
ban hanh » ban hang
su sach » so sach, vu sach
ty nang » ky nang, ty hang, ly nang
cao hoi » cau hoi, co hoi, cao hoc
hieu va » lieu va, hieu qua
xuc ban » duc ban, cuc ban, quoc ban
cua tre » cuu tre, cua triet, dua tren
va cam » va cham, va cac, va cao
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: su sach ((ty nang) or (ty xang)) cao hoi. hieu va cam xuc ban hanh vi ((cua tre) OR (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((ty nang) OR (ty xang)) cao hoi. hieu va cam xuc ban hanh vi ((cua tre) OR (cua te)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((ty nang) or (ty xang)) cao hoi. hieu va cam xuc ban hanh vi ((cua tre) OR (cua te))".
• Adding a wildcard symbol may retrieve word variants: su sach ((ty nang) or (ty xang)) cao hoi. hieu va cam xuc ban hanh vi ((cua tre) OR (cua te))*.