Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
danh lai » danh sai, gianh lai, dinh lam
lai cua » dai cua, hai cua, lai chau
va danh » va dinh, va dan, va hanh
cam duc » cam xuc, cao duc, pham duc
cua tre » cua te, cuu tre, cua triet
sach ky » sac ky, sach ty, sach kem
hieu ve » hieu va
may hoi » may thoi, tay hoi, mai hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: te ((sach ky) or (sach y)) mang may hoi. ((hieu ve) OR (hieu van)) cam duc va danh lai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach ky) OR (sach y)) mang may hoi. ((hieu ve) OR (hieu van)) cam duc va danh lai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach ky) or (sach y)) mang may hoi. ((hieu ve) OR (hieu van)) cam duc va danh lai cua tre".
• Adding a wildcard symbol may retrieve word variants: te ((sach ky) or (sach y)) mang may hoi. ((hieu ve) OR (hieu van)) cam duc va danh lai cua tre*.