Perhaps you should try some spelling variations:
bien canh » bien tinh, bien dang
hieu bien » thieu bien, hien bien, hieu hien
canh chuc » hanh phuc, anh thuc, cong chuc
va tinh » may tinh
chuc va » thuc va, thuc vat
tu sach » thu sach, su sach, te sach
xay hoi » xa hoi, tay hoi, cay phoi
tu dang » thu dang, su dang, vu dang
va cau » van cau, va cac, va dau

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 ((tu dang) OR (tu dong)) xay hoi. hieu bien canh chuc va tinh ((va cau) or (va che)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((tu dang) OR (tu dong)) xay hoi. hieu bien canh chuc va tinh ((va cau) OR (va che)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((tu dang) OR (tu dong)) xay hoi. hieu bien canh chuc va tinh ((va cau) or (va che)) tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ((tu dang) OR (tu dong)) xay hoi. hieu bien canh chuc va tinh ((va cau) or (va che)) tre*.