Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
hanh hai » thanh hai, nhanh hai, hang hai
van hanh » van thanh, ban hanh, van anh
nang xay » dang xay, nganh xay, nang xuan
hai cua » thai cua, dai cua, hoi cua
duc van » duc va, duc tan, duc manh
cac duc » cac du, cao duc, cac dac
hieu va » lieu va, hieu qua
xay hoi » xa hoi, tay hoi, cay phoi
su sach » so sach, vu sach
su xac » pu xac, su cac
su sac » su cac

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((((su sac) OR (su sach))) or (su xac)) ky nang xay hoi. hieu va cac duc van hanh hai cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((((su sac) OR (su sach))) OR (su xac)) ky nang xay hoi. hieu va cac duc van hanh hai cua viet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((su sac) OR (su sach))) or (su xac)) ky nang xay hoi. hieu va cac duc van hanh hai cua viet*".