Perhaps you should try some spelling variations:
danh doi » danh di, thanh doi, dung doi
sang ky » sang kyo, dang ky, tang ky
hieu va » lieu va, hieu qua
cam luc » cam xuc, cau luc
va danh » va dinh, va dan, va hanh
doi cua » dai cua, hoi cua, dong cua
cua tre » cua te, cuu tre, cua triet
san ky » van ky, dan ky, ban ky
va cam » va cham, va cac, va cao
luc va » duc va, tuc va, loc va
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: te ((san ky) or (sang ky)) nang x hoi. hieu va cam luc va danh doi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((san ky) OR (sang ky)) nang x hoi. hieu va cam luc va danh doi cua tre.
• Adding a wildcard symbol may retrieve word variants: te ((san ky) or (sang ky)) nang x hoi. hieu va cam luc va danh doi cua tre*.