Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
nang dai » nang dau, nang tai, lang dai
vien cac » vien bach, vien dai, vien da
xa nang » da nang, va nang, xa nong
su sach » so sach, vu sach
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
so sanh » do sanh
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 sanh)) ky lang xa hoi. hieu ((ve cac) or (vien cac)) toc xa nang dai cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sanh)) ky lang xa hoi. hieu ((ve cac) OR (vien cac)) toc xa nang dai cua viet.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (so sanh)) ky lang xa hoi. hieu ((ve cac) or (vien cac)) toc xa nang dai cua viet*.