Perhaps you should try some spelling variations:
ban tinh » ban thanh, quan tinh, ban hanh
tu sach » thu sach, su sach, te sach
tinh vi » trinh vi, tinh voi, tinh va
cuu ban » cuu van, cua ban, cuu san
cam cuu » cham cuu, cap cuu
hieu ve » hieu va, hieu van
cua tre » cua te, cuu tre, cua triet
ha hoi » hoa hoi, ha noi, xa hoi
y long » sy long, _ long, ly luong
o long » bo long, do long, vo long
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 ((y long) OR (o long)) ha hoi. ((hieu ve) or (lieu va)) cam cuu ban tinh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((y long) OR (o long)) ha hoi. ((hieu ve) OR (lieu va)) cam cuu ban tinh vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((y long) OR (o long)) ha hoi. ((hieu ve) or (lieu va)) cam cuu ban tinh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ((y long) OR (o long)) ha hoi. ((hieu ve) or (lieu va)) cam cuu ban tinh vi cua tre*.