Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
sach ky » sach y, sach ty, sach kem
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
xuc van » duc van, luc van, xuc ban
sac ky » cac ky, sai ky
va dao » ca dao
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sach ky) OR (sac ky)) nang xa hoi. hieu va dao ((xuc van) or (duc tan)) hanh vi cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (sac ky)) nang xa hoi. hieu va dao ((xuc van) OR (duc tan)) hanh vi cua viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ky) OR (sac ky)) nang xa hoi. hieu va dao ((xuc van) or (duc tan)) hanh vi cua viet".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) OR (sac ky)) nang xa hoi. hieu va dao ((xuc van) or (duc tan)) hanh vi cua viet*.