Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
so sach » so sanh, bo sach, co sach
xang xa » lang xa, mang xa, ang xa
hieu va » lieu va, hieu qua
cam duc » cam xuc, pham duc, nam duoc
cao duc » dao duc, cao suc, giao duc
di cua » dai cua, doi cua, de cua
vi cua » vai cua
y xang » ty xang

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 y xang xa hoi. hieu va ((cam duc) or (cao duc)) ban thanh ((vi cua) or (di cua)) te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach y xang xa hoi. hieu va ((cam duc) OR (cao duc)) ban thanh ((vi cua) OR (di cua)) te.
• Adding a wildcard symbol may retrieve word variants: so sach y xang xa hoi. hieu va ((cam duc) or (cao duc)) ban thanh ((vi cua) or (di cua)) te*.