Perhaps you should try some spelling variations:
ban nhanh » ban hanh, ban thanh, ban nhan
thai cua » than cua, tri cua, dai cua
sach ky » sac ky, sach ty, sach kem
nang co » nang cao, nang doc, nang noi
hieu ve » hieu va, hieu van
cam duc » cam xuc, cao duc, pham duc
duc ban » duc tan, duc van, dua ban
ve cam » ve cham, ve cac, va cam

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sach ky) OR (sach y)) nang co hoc. hieu ve cam duc ban nhanh ((thai cua) or (tai cuc)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (sach y)) nang co hoc. hieu ve cam duc ban nhanh ((thai cua) OR (tai cuc)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ky) OR (sach y)) nang co hoc. hieu ve cam duc ban nhanh ((thai cua) or (tai cuc)) tre".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) OR (sach y)) nang co hoc. hieu ve cam duc ban nhanh ((thai cua) or (tai cuc)) tre*.