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
su sach » vu sach
so sach » so sanh, bo sach, co sach
nang xa » nang x, lang xa, nang ma
ve cac » va cac, vien cac
v nang » va nang, vu nang, van nang
luc va » duc va, tuc va, loc va
ve cam » ve cham, va cam, ve cai

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