Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
ban benh » san benh, ba benh, ban banh
hieu van » hieu va, thien van, hieu ve
sach ty » sach y, sach tu, sach thu
lam xuc » cam xuc, lam duoc
xuc ban » duc ban, cuc ban, quoc ban
ty nang » ky nang, ty xang, ty hang
benh vi » benh va, benh ve, benh li
tu sach » thu sach, su sach, te sach
vi cua » vai cua, di cua
o hoi » co hoi, o hoc, o hai
x hoi » xa hoi, x ho, 5 hoi

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 ty nang ((x hoi) OR (o hoi)). ((hieu van) or (lieu va)) lam xuc ban benh vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty nang ((x hoi) OR (o hoi)). ((hieu van) OR (lieu va)) lam xuc ban benh vi cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty nang ((x hoi) OR (o hoi)). ((hieu van) or (lieu va)) lam xuc ban benh vi cua triet".
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang ((x hoi) OR (o hoi)). ((hieu van) or (lieu va)) lam xuc ban benh vi cua triet*.