Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
dang xa » dang xay, lang xa, dang ha
cuc ban » cua ban, cac ban, cuu ban
tinh da » tinh va, tinh gia, tinh lao
cua tre » cua te, cuu tre, cua triet
va cam » va cham, va cao, va cai
da cua » dai cua, day cua, dan 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 _ dang xa hoi. hieu ((va cam) or (va cac)) ((cuc ban) or (cac dan)) tinh da cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach _ dang xa hoi. hieu ((va cam) OR (va cac)) ((cuc ban) OR (cac dan)) tinh da cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach _ dang xa hoi. hieu ((va cam) or (va cac)) ((cuc ban) or (cac dan)) tinh da cua tre*.