Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
van giao » nang giao, toan giao, dan gian
va thanh » gia thanh, ban thanh, va tinh
sach ky » sac ky, sach y, sach ty
va giao » va giai, va gia, ve giao
hai cuc » tai cuc, thai cua, hai huoc
hai cua » thai cua, dai cua, hoi cua
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 ky nang x hoi. hieu ((va giao) or (van giao)) duc va thanh ((hai cuc) OR (hai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky nang x hoi. hieu ((va giao) OR (van giao)) duc va thanh ((hai cuc) OR (hai cua)) tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ky nang x hoi. hieu ((va giao) or (van giao)) duc va thanh ((hai cuc) OR (hai cua)) tre*".