Perhaps you should try some spelling variations:
cap nuoc » dat nuoc
ty nang » ky nang, ty xang, ty hang
hieu ve » hieu va, hieu van
co sach » bo sach, cuon sach, hoc sach
va danh » va dinh, va hanh, dia danh
va dan » ca dan, va dao, va dau
di cua » dai cua, doi cua, de cua
ve cap » ve cac, le cap, ve cai
nang o » nang co, nang ho, nang ro
cua te » cua tu
o hoi » co hoi, o hoc, o hai

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((do sanh) OR (co sach)) ty nang o hoi. hieu ve cap nuoc ((va danh) OR (va dan)) di cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((do sanh) or (co sach)) ty nang o hoi. hieu ve cap nuoc ((va danh) OR (va dan)) di cua te~".
• Adding a wildcard symbol may retrieve word variants: ((do sanh) or (co sach)) ty nang o hoi. hieu ve cap nuoc ((va danh) OR (va dan)) di cua te*.