Perhaps you should try some spelling variations:
cac thuc » cach thuc, can thuc, cay thuc
day danh » day manh, dai danh, dao danh
danh dai » danh dau, danh di, danh sai
ly nang » ky nang, ly hang, ly vang
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va, hieu van
cac thu » cach thuc, cac thoi
cua tre » cua te, cuu tre, cua triet
sinh » dinh, minh, kinh

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc sinh ly nang xa hoi. hieu ve ((cac thuc) or (cac thu)) day danh dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sinh ly nang xa hoi. hieu ve ((cac thuc) OR (cac thu)) day danh dai cua tre.
• Adding a wildcard symbol may retrieve word variants: hoc sinh ly nang xa hoi. hieu ve ((cac thuc) or (cac thu)) day danh dai cua tre*.