Perhaps you should try some spelling variations:
hanh dai » hanh tai, hanh dao, vanh dai
tyu hang » thu hang, ty hang, thu thang
co sach » bo sach, cuon sach, hoc sach
chuc va » thuc va, thuc vat
phuc va » phuc vu, thuc va, thuc vat
hieu ve » hieu va, hieu van
tai hoa » tai khoa, thai hoa, thi hoa
yu hang » yu zhang, yu pang, yu wang
cua tre » cua te, cuu tre, cua triet
ve cau » ke cau, va cau, ve cac

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: co sach ((yu hang) or (tyu hang)) tai hoa. hieu ve cau ((phuc va) or (chuc va)) hanh dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: co sach ((yu hang) OR (tyu hang)) tai hoa. hieu ve cau ((phuc va) OR (chuc va)) hanh dai cua tre.
• Adding a wildcard symbol may retrieve word variants: co sach ((yu hang) or (tyu hang)) tai hoa. hieu ve cau ((phuc va) or (chuc va)) hanh dai cua tre*.