Perhaps you should try some spelling variations:
van tham » van thanh, van tuan, van chat
tham soc » cham soc, tham nuoc, thai son
dinh chi » dinh thi, dinh tri, dinh moi
toc sach » hoc sach, doc sach, thuoc sach
hieu van » hieu va, thien van, lieu va
va thanh » gia thanh, ban thanh, va tinh
soc va » hoc va, loc va, doc va
x hoi » xa hoi, o hoi, x ho

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) or (toc sach)) ky nang x hoi. hieu van tham soc va thanh ((dinh cuu) OR (dinh chi)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (toc sach)) ky nang x hoi. hieu van tham soc va thanh ((dinh cuu) OR (dinh chi)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) or (toc sach)) ky nang x hoi. hieu van tham soc va thanh ((dinh cuu) OR (dinh chi)) tre".
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (toc sach)) ky nang x hoi. hieu van tham soc va thanh ((dinh cuu) OR (dinh chi)) tre*.