Perhaps you should try some spelling variations:
vien canh » bien canh, vien can, vien nganh
canh chuc » hanh phuc, anh thuc, cong chuc
hieu vien » hieu hien, hieu viec, thieu nien
va tinh » may tinh
chuc va » thuc va, thuc vat
su sach » so sach, vu sach
xay hoi » xa hoi, tay hoi, cay phoi
ky dang » ky danh
va chu » va cau, va chi

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ((ky dang) or (ky nang)) xay hoi. hieu vien canh chuc va tinh ((va chu) OR (va che)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((ky dang) OR (ky nang)) xay hoi. hieu vien canh chuc va tinh ((va chu) OR (va che)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((ky dang) or (ky nang)) xay hoi. hieu vien canh chuc va tinh ((va chu) OR (va che)) tre".
• Adding a wildcard symbol may retrieve word variants: su sach ((ky dang) or (ky nang)) xay hoi. hieu vien canh chuc va tinh ((va chu) OR (va che)) tre*.