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 hanh » van hanh, va thanh, ban hanh
va danh » va dinh, va dan, dia danh
cuc tre » cua tre, cuu tre, cuc thue
duc tre » duoc tren, duc tien
tu sai » tu bai, tu san, tu cai
sai ky » sac ky
va cam » va cham, va cac, va cao

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 nang xa hoi. hieu va cam duc ((va hanh) or (va danh)) tai ((cuc tre) OR (duc tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sai ky nang xa hoi. hieu va cam duc ((va hanh) OR (va danh)) tai ((cuc tre) OR (duc tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sai ky nang xa hoi. hieu va cam duc ((va hanh) or (va danh)) tai ((cuc tre) OR (duc tre))".
• Adding a wildcard symbol may retrieve word variants: tu sai ky nang xa hoi. hieu va cam duc ((va hanh) or (va danh)) tai ((cuc tre) OR (duc tre))*.