Perhaps you should try some spelling variations:
tinh voi » trinh voi, tinh doi, binh voi
tu sach » thu sach, su sach, te sach
cuu ban » cuu van, cua ban, cuu san
tinh vi » trinh vi, tinh va, dinh vi
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu va, hieu van
dong ha » dong hoa, dong va, dong hoc
y dong » ly dong, ty dong, _ dong
ha hoi » hoa hoi, ha noi, xa hoi

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 dong ha hoi. ((hieu ve) or (lieu va)) cap cuu ban ((tinh vi) OR (tinh voi)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y dong ha hoi. ((hieu ve) OR (lieu va)) cap cuu ban ((tinh vi) OR (tinh voi)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y dong ha hoi. ((hieu ve) or (lieu va)) cap cuu ban ((tinh vi) OR (tinh voi)) cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sach y dong ha hoi. ((hieu ve) or (lieu va)) cap cuu ban ((tinh vi) OR (tinh voi)) cua tre*.