Perhaps you should try some spelling variations:
nang xa » nang x, lang xa, nang ma
hieu ve » hieu van
hieu va » lieu va, hieu qua
cam duc » cam xuc, cao duc, pham duc
va hanh » van hanh, va thanh, va danh
hanh li » nhanh li, hanh vi, han li
ca viet » va viet, co viet, hoa viet
sai ky » sac ky
li ca » ly ca

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

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