Perhaps you should try some spelling variations:
sach hay » sach han, sach ha, sach nay
nang cau » hang cau, nang dau, bang cau
hieu ve » hieu va, hieu van
va hanh » van hanh, va thanh, va danh
ve cam » ve cham, ve cac, va cam
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) OR (nang cao)) hoi. hieu ve 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) OR (nang cao)) hoi. hieu ve 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) OR (nang cao)) hoi. hieu ve cam xuc va hanh vi cua te".
• Adding a wildcard symbol may retrieve word variants: tu ((sach hay) or (sach y)) ((nang cau) OR (nang cao)) hoi. hieu ve cam xuc va hanh vi cua te*.