Perhaps you should try some spelling variations:
ban trinh » ban tinh, dan trinh, van trinh
hieu van » thien van, lieu va
trinh vi » trinh va, trinh ve, trinh viet
tu sach » thu sach, su sach, te sach
cuc ban » cua ban, cac ban, cuu ban
cam cuc » cam xuc, cham cuu, pham cuc
cua tre » cua te, cuu tre, cua triet
hieu va » lieu va, hieu qua
lang xa » lang ha, dang xay, lang van
vi cua » vai cua, di cua

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 _ lang xa hoi. ((((hieu ve) OR (hieu va))) or (hieu van)) cam cuc ban trinh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach _ lang xa hoi. ((((hieu ve) OR (hieu va))) OR (hieu van)) cam cuc ban trinh vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach _ lang xa hoi. ((((hieu ve) OR (hieu va))) or (hieu van)) cam cuc ban trinh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sach _ lang xa hoi. ((((hieu ve) OR (hieu va))) or (hieu van)) cam cuc ban trinh vi cua tre*.