Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
hanh cua » manh cua, hang cua, hanh sua
cua cua » cua chua, ca cua, qua cua
va hanh » van hanh, va thanh, va danh
cam loc » cam lo
so sach » bo sach, co sach, hoc sach
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
so sanh » do sanh
loc va » hoc va, luc va

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 (so sanh)) ky nang xa hoi. ((hieu ve) or (hieu qua)) cam loc va hanh cua cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sach) OR (so sanh)) ky nang xa hoi. ((hieu ve) OR (hieu qua)) cam loc va hanh cua cua viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((so sach) OR (so sanh)) ky nang xa hoi. ((hieu ve) or (hieu qua)) cam loc va hanh cua cua viet".
• Adding a wildcard symbol may retrieve word variants: ((so sach) OR (so sanh)) ky nang xa hoi. ((hieu ve) or (hieu qua)) cam loc va hanh cua cua viet*.