Perhaps you should try some spelling variations:
sach nay » sach hay, sach vay, sach nang
nang cau » nang cao, hang cau, nang dau
hieu ve » hieu va, hieu van
va danh » va dinh, va dan, va hanh
vai cua » dai cua, hai cua, lai cua
ve cam » ve cham, ve cac, va cam
xuc va » duc va, tuc va, luc va
vi cua » di cua

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 nay) or (sach y)) nang cau hoi. hieu ve cam xuc va danh ((vi cua) OR (vai cua)) te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach nay) OR (sach y)) nang cau hoi. hieu ve cam xuc va danh ((vi cua) OR (vai cua)) te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach nay) or (sach y)) nang cau hoi. hieu ve cam xuc va danh ((vi cua) OR (vai cua)) te".
• Adding a wildcard symbol may retrieve word variants: tu ((sach nay) or (sach y)) nang cau hoi. hieu ve cam xuc va danh ((vi cua) OR (vai cua)) te*.