Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
te sach » toc sach
ly nang » ky nang, ly hang, ly vang
van hau » van ha, van dau, van hac
van hai » van ha, van chat, van phan
duc van » duc va, duc tan, duc manh
kem cua » em cua, keo cua, diem cua
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, v nang, may nang

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ((y nang) or (ly nang)) xa hoi. hieu ((van hau) OR (van hai)) duc van hanh kem cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((y nang) OR (ly nang)) xa hoi. hieu ((van hau) OR (van hai)) duc van hanh kem cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((y nang) or (ly nang)) xa hoi. hieu ((van hau) OR (van hai)) duc van hanh kem cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach ((y nang) or (ly nang)) xa hoi. hieu ((van hau) OR (van hai)) duc van hanh kem cua tre*.