Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
hieu van » hieu va, thien van, lieu va
su sach » so sach, vu sach
tuc van » thuc van, truc van, tuc va
cac tuc » cac toc, cac tu, cac tac
van cac » van hac, van cau, van bac
ly nang » ky nang, ly hang, ly vang
bo sach » co sach, hoc sach
cuu tre » cua tre, cau tren, cau treo
y nang » ky nang, v nang, may nang
vi cuu » vi luu, vinh cuu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((su sach) or (bo sach)) ((y nang) or (ly nang)) xa hoi. hieu van cac tuc van hanh vi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (bo sach)) ((y nang) OR (ly nang)) xa hoi. hieu van cac tuc van hanh vi cuu tre.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (bo sach)) ((y nang) or (ly nang)) xa hoi. hieu van cac tuc van hanh vi cuu tre*.