Perhaps you should try some spelling variations:
chieu chien » thien chien, hieu hien
chien bach » vien bach, chien dich, thien hach
hanh va » hang va, hanh vi
luan va » luan van, luat va
xuan va » xuat va, quan va, xuan ha
tu sach » thu sach, su sach, te sach
ty nang » ky nang, ty hang, ly nang
huu tre » huu tri, cuu tre, huu them
va huu » vu huu

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) or (ty xang)) xa hoi. chieu chien bach ((xuan va) OR (luan va)) hanh va huu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ty nang) OR (ty xang)) xa hoi. chieu chien bach ((xuan va) OR (luan va)) hanh va huu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((ty nang) or (ty xang)) xa hoi. chieu chien bach ((xuan va) OR (luan va)) hanh va huu tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ((ty nang) or (ty xang)) xa hoi. chieu chien bach ((xuan va) OR (luan va)) hanh va huu tre*.