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