Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
ban hanh » ban hang
van hanh » van thanh, van anh, van ban
so sach » so sanh, bo sach, co sach
hieu ve » hieu va, hieu van
ve giao » te giao, viet giao, van giao
vai cua » dai cua, hai cua, lai cua
cua te » cua tu
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 ve giao duc ((ban hanh) or (van hanh)) vai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (so sach)) ky nang x hoi. hieu ve giao duc ((ban hanh) OR (van hanh)) vai cua te.
• Adding a wildcard symbol may retrieve word variants: ((thu sach) or (so sach)) ky nang x hoi. hieu ve giao duc ((ban hanh) or (van hanh)) vai cua te*.