Perhaps you should try some spelling variations:
ban hanh » ban hang
tu sach » thu sach, su sach, te sach
xay hoi » xa hoi, tay hoi, cay phoi
hieu va » lieu va, hieu qua
cac xuc » cam xuc, cac nuoc, chat xuc
y dang » ky dang, 2 dang, b dang
_ dang » _ dan, 2 dang, _ danh
di cua » dai cua, doi cua, de cua
cua tu » cua tuc, cua su, cua cu

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 dang) OR (_ dang)) xay hoi. hieu va cac xuc ((ban hanh) or (gia thanh)) di cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((y dang) OR (_ dang)) xay hoi. hieu va cac xuc ((ban hanh) OR (gia thanh)) di cua tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((y dang) OR (_ dang)) xay hoi. hieu va cac xuc ((ban hanh) or (gia thanh)) di cua tu".
• Adding a wildcard symbol may retrieve word variants: tu sach ((y dang) OR (_ dang)) xay hoi. hieu va cac xuc ((ban hanh) or (gia thanh)) di cua tu*.