Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
chat xuc » chat huu, cam xuc, chao xu
van hanh » ban hanh, van anh, van ban
cua viet » ca viet, hoa viet, cua vat
tu sach » thu sach, su sach, te sach
cao hoi » co hoi, cao hoc, tao hoi
hieu ve » hieu va, hieu van
ve chat » va chat, van chat
y nang » ky nang, ly nang, v nang
ve cua » le cua, de cua, te cua

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 ((cao hoi) OR (cau hoi)). hieu ve chat xuc ((van hanh) or (van thanh)) ve cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang ((cao hoi) OR (cau hoi)). hieu ve chat xuc ((van hanh) OR (van thanh)) ve cua viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y nang ((cao hoi) OR (cau hoi)). hieu ve chat xuc ((van hanh) or (van thanh)) ve cua viet".
• Adding a wildcard symbol may retrieve word variants: tu sach y nang ((cao hoi) OR (cau hoi)). hieu ve chat xuc ((van hanh) or (van thanh)) ve cua viet*.