Perhaps you should try some spelling variations:
cham truc » cau truc, nham thuc, pham thuc
va phan » van phan, va phat, va phap
truc va » thuc va, thuc vat, trung va
tu sach » thu sach, su sach, te sach
hieu vu » hieu va, hieu ve, hieu su
ty nang » ty xang, ty hang, ly nang
vu cham » va cham, vu kham, tu cham
ho hoi » hoc hoi, hoa hoi, hoi hoi
lap su » lap tu, lai su, lap so

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: tu sach ((ty nang) OR (ky nang)) ho hoi. hieu vu cham truc va phan ((lap su) OR (lap du)) triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((ty nang) OR (ky nang)) ho hoi. hieu vu cham truc va phan ((lap su) or (lap du)) triet~".
• Adding a wildcard symbol may retrieve word variants: tu sach ((ty nang) OR (ky nang)) ho hoi. hieu vu cham truc va phan ((lap su) or (lap du)) triet*.