Perhaps you should try some spelling variations:
cuon sach » duong sach, cuoc cach, co sach
trinh voi » trinh hoi, trinh vi, trinh boi
tinh voi » tinh doi, binh voi, minh voi
sach thu » sach thue, sach thieu, sach tham
hieu van » hieu va, thien van, lieu va
nang ma » tang ma, sang ma, nang cao
van cam » van nam, van lam, van cau
nang xa » nang x, lang xa, mang xa
cua tre » cua te, cuu tre, cua triet
xuc va » duc va, tuc va, luc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: cuon sach thu ((nang xa) or (nang ma)) hoi. hieu van cam xuc va ((tinh voi) or (trinh voi)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: cuon sach thu ((nang xa) OR (nang ma)) hoi. hieu van cam xuc va ((tinh voi) OR (trinh voi)) cua tre.
• Adding a wildcard symbol may retrieve word variants: cuon sach thu ((nang xa) or (nang ma)) hoi. hieu van cam xuc va ((tinh voi) or (trinh voi)) cua tre*.