Perhaps you should try some spelling variations:
hanh dai » hanh tai, hanh dao, vanh dai
hieu ve » hieu va, hieu van
cac duc » cac du, cao duc, cac dac
va hanh » van hanh, va thanh, va danh
tu sac » tu sach, tu san, tu bac
ve cac » va cac, vien cac
cua cu » cua chu, cua cau, cua su
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: ((tu sac) or (tu cac)) ky nang ((x ho) or (o hoi)). hieu ve cac duc va hanh dai cua cu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sac) OR (tu cac)) ky nang ((x ho) OR (o hoi)). hieu ve cac duc va hanh dai cua cu.
• Adding a wildcard symbol may retrieve word variants: ((tu sac) or (tu cac)) ky nang ((x ho) or (o hoi)). hieu ve cac duc va hanh dai cua cu*.