Perhaps you should try some spelling variations:
nhanh thai » nhanh thi, nhanh thanh, nhanh thang
thu sach » tu sach, thuat sach, thuoc sach
thai cua » than cua, tai cuc, tri cua
cap phoi » cap cho
duc ban » duc tan, dua ban, duc man
duc van » duc va, duc tan, duc manh
cua tre » cua te, cuu tre, cua triet
hieu va » lieu va, hieu qua
ky danh » ky anh, ky dang
va cam » va cham, va cac, va cao

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) or (ky danh)) cap phoi. hieu va cam ((duc ban) OR (duc van)) nhanh thai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ((ky nang) OR (ky danh)) cap phoi. hieu va cam ((duc ban) OR (duc van)) nhanh thai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ((ky nang) or (ky danh)) cap phoi. hieu va cam ((duc ban) OR (duc van)) nhanh thai cua tre".
• Adding a wildcard symbol may retrieve word variants: thu sach ((ky nang) or (ky danh)) cap phoi. hieu va cam ((duc ban) OR (duc van)) nhanh thai cua tre*.