Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
danh xay » dang xay, manh xay, anh xay
lang cua » mang cua, hang cua, long cua
cac duc » cac du, cao duc, cac dac
duc ban » duc tan, duc van, dua ban
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
hieu va » hieu qua
xay hoi » xa hoi, tay hoi, cay phoi
ky danh » ky anh, ky dang

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ky danh xay hoi. ((hieu va) OR (lieu va)) cac duc ban ((lanh dao) or (lang cua)) cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky danh xay hoi. ((hieu va) OR (lieu va)) cac duc ban ((lanh dao) OR (lang cua)) cua viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky danh xay hoi. ((hieu va) OR (lieu va)) cac duc ban ((lanh dao) or (lang cua)) cua viet".
• Adding a wildcard symbol may retrieve word variants: su sach ky danh xay hoi. ((hieu va) OR (lieu va)) cac duc ban ((lanh dao) or (lang cua)) cua viet*.