Perhaps you should try some spelling variations:
pham cuu » pham huu, cham cuu, pham cua
van hanh » van thanh, ban hanh, van anh
hanh dai » hanh tai, hanh dao, vanh dai
hieu va » lieu va, hieu qua
va pham » van pham, va phat, va phap
cua tre » cua te, cuu tre, cua triet
co hoi » co hoc, co loi
o hoi » o hoc, o hai, o hoa

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

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