Perhaps you should try some spelling variations:
van dinh » van minh, van dich, xuan dinh
toc sac » toc sach, toc san, hoc sach
nang xa » nang x, lang xa, nang ma
hieu va » hieu qua
cam luc » cam xuc, cau luc
va dinh » va kinh, va tinh, vu dinh
duc cuu » duc suu
cuu tre » cua tre, cau tren, cau treo
sac ky » cac ky, sai ky

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sac ky nang xa hoi. ((hieu va) OR (lieu va)) cam luc ((va dinh) or (van dinh)) duc cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sac ky nang xa hoi. ((hieu va) OR (lieu va)) cam luc ((va dinh) OR (van dinh)) duc cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sac ky nang xa hoi. ((hieu va) OR (lieu va)) cam luc ((va dinh) or (van dinh)) duc cuu tre".
• Adding a wildcard symbol may retrieve word variants: toc sac ky nang xa hoi. ((hieu va) OR (lieu va)) cam luc ((va dinh) or (van dinh)) duc cuu tre*.