Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hieu van » hieu va, thien van, lieu va
van hanh » van thanh, ban hanh, van ban
van anh » van thanh, tuan anh, van minh
cam duc » cam xuc, cao duc, pham duc
sach ty » sach y, sach tu, sach thu
su sach » so sach, vu sach
hieu ve » hieu va
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang
di cua » dai cua, doi cua, de cua

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 ty nang xa hoi. ((hieu ve) OR (hieu van)) cam duc ((van hanh) OR (van anh)) di cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty nang xa hoi. ((hieu ve) or (hieu van)) cam duc ((van hanh) OR (van anh)) di cua triet~".
• Adding a wildcard symbol may retrieve word variants: su sach ty nang xa hoi. ((hieu ve) or (hieu van)) cam duc ((van hanh) OR (van anh)) di cua triet*.