Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
hanh va » hang va, hanh vi
va hanh » van hanh, va thanh, va danh
cam luc » cam xuc, cau luc
hieu va » lieu va, hieu qua
tu sach » thu sach, su sach, te sach
hieu ve » hieu van
ly nang » ky nang, ly hang, ly vang
y nang » ky nang, v nang, may nang
luc va » duc va, tuc va, loc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ((y nang) OR (ly nang)) xa hoi. ((hieu ve) or (hieu va)) cam luc va hanh va su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((y nang) OR (ly nang)) xa hoi. ((hieu ve) OR (hieu va)) cam luc va hanh va su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((y nang) OR (ly nang)) xa hoi. ((hieu ve) or (hieu va)) cam luc va hanh va su triet".
• Adding a wildcard symbol may retrieve word variants: tu sach ((y nang) OR (ly nang)) xa hoi. ((hieu ve) or (hieu va)) cam luc va hanh va su triet*.