Perhaps you should try some spelling variations:
sach hay » sach han, sach ha, sach nay
nang cau » nang cao, hang cau, nang dau
hieu va » lieu va, hieu qua
va cam » va cham, va cac, va cao
xuc va » duc va, tuc va, xac va
luc va » duc va, tuc va, loc 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 va cam ((xuc va) or (luc 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 va cam ((xuc va) OR (luc va)) hanh vi cua te.
• Adding a wildcard symbol may retrieve word variants: tu ((sach hay) or (sach y)) nang cau hoi. hieu va cam ((xuc va) or (luc va)) hanh vi cua te*.