Perhaps you should try some spelling variations:
thuat san » thuat toan, thuat song, thuat lanh
hanh dai » hanh tai, hanh dao, vanh dai
san ky » sang ky, van ky, dan ky
nang o » nang co, nang ho, nang ro
ve cao » va cao, ve bao, ve cac
va dao » ca dao
soc va » hoc va, loc va, doc va
cua te » cua tu
o hoi » co hoi, o hoc, o hai

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuat san ky nang o hoi. hieu ((ve cao) or (va dao)) ((soc va) or (duc va)) hanh dai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat san ky nang o hoi. hieu ((ve cao) OR (va dao)) ((soc va) OR (duc va)) hanh dai cua te.
• Adding a wildcard symbol may retrieve word variants: thuat san ky nang o hoi. hieu ((ve cao) or (va dao)) ((soc va) or (duc va)) hanh dai cua te*.