Perhaps you should try some spelling variations:
han thanh » phan thanh, hoan thanh, huan thanh
chat huu » pham huu
thanh ve » hanh ve, thanh va, thanh vien
bo sach » co sach, hoc sach
hieu vu » hieu va, hieu ve, hieu su
vu chat » va chat, ve chat, du chat
cua tre » cua te, cuu tre, cua triet
ve cua » le cua, de cua, te cua
x hoi » xa hoi, o hoi, 5 hoi

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) or (bo sach)) ky nang ((x hoi) or (x ho)). hieu vu chat huu han thanh ve cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cac) OR (bo sach)) ky nang ((x hoi) OR (x ho)). hieu vu chat huu han thanh ve cua tre.
• Adding a wildcard symbol may retrieve word variants: ((tu cac) or (bo sach)) ky nang ((x hoi) or (x ho)). hieu vu chat huu han thanh ve cua tre*.