Perhaps you should try some spelling variations:
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
cam duc » cam xuc, cao duc, pham duc
va danh » va dinh, va hanh, dia danh
cua tre » cuu tre, cua triet, dua tren
vu san » va san, vu ban
san ky » sang ky, van ky, dan ky
va cam » va cham, va cac, va cao
va dan » ca dan, va dao, va dau
cua te » cua tu

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

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