Perhaps you should try some spelling variations:
danh sai » dung sai, danh bat, danh dau
danh dai » danh dau, danh di, vanh dai
sach ky » sach y, sach ty, sach kem
bao luc » bao thuc
hieu ve » hieu va, hieu van
cua tuc » cua duc, cua tu, cua thuoc
ve bao » te bao, va bao
luc va » duc va, tuc va, loc va
sac ky » cac ky, sai ky
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu ((sach ky) or (sac ky)) nang x hoi. hieu ve bao luc va ((danh dai) OR (danh sai)) cua tuc~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu ((sach ky) OR (sac ky)) nang x hoi. hieu ve bao luc va ((danh dai) OR (danh sai)) cua tuc.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu ((sach ky) or (sac ky)) nang x hoi. hieu ve bao luc va ((danh dai) OR (danh sai)) cua tuc".
• Adding a wildcard symbol may retrieve word variants: thu ((sach ky) or (sac ky)) nang x hoi. hieu ve bao luc va ((danh dai) OR (danh sai)) cua tuc*.