Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
nang doi » nang doc, nang noi, hang doi
vien cac » vien bach, vien dai, vien da
doi cua » dai cua, hoi cua
xa nang » da nang, va nang, xa nong
su sach » vu sach
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
so sach » so sanh, bo sach, co sach
toc xa » tuc xa, toc ta, hoc xa
ve cac » va cac

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