Perhaps you should try some spelling variations:
hieu viec » nhieu viec, hieu ve, sieu viet
viec bach » vien bach, viec ban, viec bao
bach nuoc » bach tuoc, sach nuoc, bich ngoc
so sach » so sanh, bo sach, hoc sach
co sach » bo sach, cuon sach, hoc sach
ty nang » ty xang, ty hang, ly nang
va hanh » van hanh, va thanh, va danh
hanh di » hanh vi, hanh de, hang di
cuu tre » cua tre, cau tren, cau treo
di cuu » di cau, di cua, dinh cuu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((so sach) or (co sach)) ((ty nang) OR (ky nang)) xa hoi. hieu viec bach nuoc va hanh di cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sach) OR (co sach)) ((ty nang) OR (ky nang)) xa hoi. hieu viec bach nuoc va hanh di cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((so sach) or (co sach)) ((ty nang) OR (ky nang)) xa hoi. hieu viec bach nuoc va hanh di cuu tre".
• Adding a wildcard symbol may retrieve word variants: ((so sach) or (co sach)) ((ty nang) OR (ky nang)) xa hoi. hieu viec bach nuoc va hanh di cuu tre*.