Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
cua triet » su triet, va triet
dua tren » dung tren
cua viet » ca viet, hoa viet, cua vat
su sach » so sach, vu sach
hieu va » lieu va, hieu qua
xuc van » duc van, luc van, vuc van
y nang » ky nang, ly nang, v nang
va cam » va cham, va cac, va cao
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: su sach y nang x hoi. hieu va cam xuc van thanh san ((dua tren) or (((cua triet) OR (cua viet))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang x hoi. hieu va cam xuc van thanh san ((dua tren) OR (((cua triet) OR (cua viet)))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y nang x hoi. hieu va cam xuc van thanh san ((dua tren) or (((cua triet) OR (cua viet))))".
• Adding a wildcard symbol may retrieve word variants: su sach y nang x hoi. hieu va cam xuc van thanh san ((dua tren) or (((cua triet) OR (cua viet))))*.