Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
sach hay » sach han, sach ha, sach nay
hieu va » lieu va, hieu qua
sach ly » sach lo, sach ty, sach luu
cau xuc » cam xuc, cau luc, cau truc
va hanh » van hanh, va thanh, va danh
hanh di » hanh vi, hanh de, hang di
va cau » van cau, va cac, va dau
xuc va » duc va, tuc va, luc va
di cua » dai cua, doi cua, de cua
x hoi » xa hoi, o hoi, x ho

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

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