Perhaps you should try some spelling variations:
bieu thien » bieu hien, dieu khien, bien phien
thien cac » hien cac, thien cau, thieu cac
danh dan » danh dau, canh dan, dang dan
kho tang » cao tang
tu sach » thu sach, te sach, tu cach
dan cua » dan ca, ban cua, dai cua
va danh » va dinh, va dan, va hanh
cac luc » cau luc, coc luc, cac nuoc
cua cau » cua cac, cua chu, cua cay
tang ma » mang may, tang van
so sach » so sanh, bo sach, co sach
su sach » vu sach
luc va » duc va, tuc va, loc va
ma hoi » mai hoi, xa hoi, ma hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) or (((su sach) OR (so sach)))) kho tang ma hoi. bieu thien cac luc va danh dan cua cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (((su sach) OR (so sach)))) kho tang ma hoi. bieu thien cac luc va danh dan cua cau*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (((su sach) OR (so sach)))) kho tang ma hoi. bieu thien cac luc va danh dan cua cau*".