Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
va danh » va dinh, va dan, dia danh
va hanh » van hanh, va thanh, ban hanh
hieu va » lieu va, hieu qua
su sach » so sach
nang xa » nang x, lang xa, nang ma
vu sach » vu bach, vu khach
cao luc » bao luc, cao duc, cao suc
va cao » va cac, va co, va dao
y nang » ky nang, ly nang, v nang
ca cua » co cua

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) OR (vu sach)) y nang xa hoi. hieu va cao luc ((va hanh) or (va danh)) ca cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (vu sach)) y nang xa hoi. hieu va cao luc ((va hanh) OR (va danh)) ca cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) OR (vu sach)) y nang xa hoi. hieu va cao luc ((va hanh) or (va danh)) ca cua triet".
• Adding a wildcard symbol may retrieve word variants: ((su sach) OR (vu sach)) y nang xa hoi. hieu va cao luc ((va hanh) or (va danh)) ca cua triet*.