Perhaps you should try some spelling variations:
su sach » so sach, vu sach
ky dang » ky danh
mau hoi » cau hoi, mai hoi, mau ho
hieu va » lieu va, hieu qua
cuc tre » duc tre, cua tre, cuu tre
va cam » va cham, va cac, va cao
luc va » tuc va, loc va
va cuc » va cuoc, van cuc, va 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 sach ((ky dang) or (ky nang)) mau hoi. hieu va cam ((luc va) or (duc va)) hang va cuc tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((ky dang) OR (ky nang)) mau hoi. hieu va cam ((luc va) OR (duc va)) hang va cuc tre.
• Adding a wildcard symbol may retrieve word variants: su sach ((ky dang) or (ky nang)) mau hoi. hieu va cam ((luc va) or (duc va)) hang va cuc tre*.