Perhaps you should try some spelling variations:
hanh dai » hanh tai, hanh dao, vanh dai
cach tu » cach thuc
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet
sac ky » cac ky, sai ky
ve cao » va cao, ve bao, ve co
ve cac » va cac, vien cac
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: thu ((cach tu) OR (sac ky)) nang x hoi. hieu ((ve cao) OR (ve cac)) duc va hanh dai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu ((cach tu) OR (sac ky)) nang x hoi. hieu ((ve cao) OR (ve cac)) duc va hanh dai cua tre".
• Adding a wildcard symbol may retrieve word variants: thu ((cach tu) OR (sac ky)) nang x hoi. hieu ((ve cao) OR (ve cac)) duc va hanh dai cua tre*.