Perhaps you should try some spelling variations:
nang cau » nang cao, hang cau, nang dau
cao xuc » cam xuc, cao duc, cao suc
hai cua » thai cua, dai cua, hoi cua
vai cua » dai cua, lai cua, bai cua
va hanh » van hanh, va thanh, va danh
sach ky » sac ky, sach ty, sach kem
hieu va » lieu va, hieu qua
xuc va » duc va, tuc va, luc va
va cao » va cac, va co, va dao

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

• Performing a fuzzy search may retrieve terms with similar spellings: su ((sach ky) or (sach y)) nang cau hoi. hieu va cao xuc va hanh ((vai cua) OR (hai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach ky) OR (sach y)) nang cau hoi. hieu va cao xuc va hanh ((vai cua) OR (hai cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach ky) or (sach y)) nang cau hoi. hieu va cao xuc va hanh ((vai cua) OR (hai cua)) tre".
• Adding a wildcard symbol may retrieve word variants: su ((sach ky) or (sach y)) nang cau hoi. hieu va cao xuc va hanh ((vai cua) OR (hai cua)) tre*.