Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
da nang » cam nang, kha nang, cao nang
va hang » van hang, va nang, va lang
hieu va » lieu va, hieu qua
cua tre » cua te, cuu tre, cua triet
so sach » so sanh, bo sach, co sach
di cua » dai cua, doi cua, de cua
va cam » va cham, va cac, va cao
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((thu sach) or (so sach)) ky nang x hoi. hieu va cam xuc ((va hang) or (da nang)) di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (so sach)) ky nang x hoi. hieu va cam xuc ((va hang) OR (da nang)) di cua tre.
• Adding a wildcard symbol may retrieve word variants: ((thu sach) or (so sach)) ky nang x hoi. hieu va cam xuc ((va hang) or (da nang)) di cua tre*.