Perhaps you should try some spelling variations:
nang noi » nang doc
hanh dai » hanh tai, hanh dao, vanh dai
nang ra » nang ma, lang ra, nang ro
qua cam » qua cham, qua cac, qua ca
cam luc » cam xuc, cau luc
va hanh » van hanh, va thanh, va danh
sac ky » sai ky
luc va » duc va, tuc va, loc va
cua tu » cua tuc, cua su, cua cu

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sac ky) or (cac ky)) ((nang noi) or (nang ra)) hoi. hieu qua cam luc va hanh dai cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sac ky) OR (cac ky)) ((nang noi) OR (nang ra)) hoi. hieu qua cam luc va hanh dai cua tu.
• Adding a wildcard symbol may retrieve word variants: tu ((sac ky) or (cac ky)) ((nang noi) or (nang ra)) hoi. hieu qua cam luc va hanh dai cua tu*.