Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
hanh dao » lanh dao, thanh dat, thanh dam
ban hanh » ban hang
gian cac » gian dan, gian cua
cuc ban » cua ban, cac ban, cuu ban
ty nang » ky nang, ty hang, ly nang
dao cua » dai cua, day cua, dan cua
tu sach » thu sach, su sach, te sach

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. hieu ((gian cac) or (vien bach)) cuc ban hanh dao cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ty nang) OR (ty xang)) xa hoi. hieu ((gian cac) OR (vien bach)) cuc ban hanh dao cua viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((ty nang) OR (ty xang)) xa hoi. hieu ((gian cac) or (vien bach)) cuc ban hanh dao cua viet".
• Adding a wildcard symbol may retrieve word variants: tu sach ((ty nang) OR (ty xang)) xa hoi. hieu ((gian cac) or (vien bach)) cuc ban hanh dao cua viet*.