Perhaps you should try some spelling variations:
sach hay » sach han, sach ha, sach nay
nang cau » nang cao, hang cau, nang dau
va hanh » van hanh, va thanh, va danh
ve cam » ve cham, ve cac, ve cai
va cam » va cham, va cac, va cao
xuc va » duc va, tuc va, luc va
vi cua » vai cua, di cua
cua te » cua tu

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