Perhaps you should try some spelling variations:
nang xa » nang x, lang xa, nang ma
hieu va » lieu va
cam duc » cam xuc, cao duc, pham duc
va danh » va dan, va hanh, dia danh
va dinh » van dinh, va kinh, va tinh
cua tre » cua te, cuu tre, cua triet
vu sac » vu sach, vu san, va sac
sac ky » cac ky, sai ky
di cua » dai cua, doi cua, de cua

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

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