Perhaps you should try some spelling variations:
thang dai » hang dau, thanh hai, trung dai
van thang » van thanh, van khang, van hang
cua triet » cua viet, su triet, va triet
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
hieu ve » hieu van
hieu va » hieu qua
cam tuc » cam xuc, cam tu, nam thuc
tuc van » thuc van, truc van, tuc va

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

• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang xa hoi. ((hieu ve) OR (((hieu va) OR (lieu va)))) cam tuc van thang dai cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang xa hoi. ((hieu ve) or (((hieu va) OR (lieu va)))) cam tuc van thang dai cua triet~".
• Adding a wildcard symbol may retrieve word variants: su sach ky nang xa hoi. ((hieu ve) or (((hieu va) OR (lieu va)))) cam tuc van thang dai cua triet*.