Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
dang van » hoang van, hang va
hoi cua » hoi chuc
xuc van » duc van, luc van, vuc van
dau xuc » dau xac, dau xua, dau nuoc
so sach » bo sach, co sach, hoc sach
van hoi » van hoa, van hoc, van hoe
ky dang » ky nang, ky danh
so sanh » do sanh
di cua » dai cua, doi cua, de cua
va dau » va dao

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((so sach) or (so sanh)) ky dang van hoi. lieu va dau xuc van hanh ((di cua) or (hoi cua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sach) OR (so sanh)) ky dang van hoi. lieu va dau xuc van hanh ((di cua) OR (hoi cua)) triet.
• Adding a wildcard symbol may retrieve word variants: ((so sach) or (so sanh)) ky dang van hoi. lieu va dau xuc van hanh ((di cua) or (hoi cua)) triet*.