Perhaps you should try some spelling variations:
lang cua » mang cua, hang cua, long cua
danh xay » dang xay, manh xay, anh xay
hieu va » lieu va, hieu qua
duc ban » duc tan, duc van, dua ban
cac duc » cac du, cao duc, cac dac
su sach » vu sach
xay hoi » xa hoi, tay hoi, cay phoi
ky danh » ky anh, ky dang
so sach » so sanh, bo sach, co sach

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