Perhaps you should try some spelling variations:
bieu hien » dieu hien, dieu khien, bien phien
thu sach » tu sach, thuat sach, thuoc sach
gian cua » gian xu, ban cua
giau cua » gia cua, dieu cua, bieu cua
hien cac » thien cac, vien cac, hieu cac
mai hoi » mai khoi, dai hoi, lai hoi
sach ky » sac ky, sach y, sach ty
van anh » van thanh, tuan anh, van minh
cac lo » cac lop, cac co, cac bo
lo van » le van, vo van, so van
ma hoi » xa hoi, ma hoa, me hoi

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 nang ((ma hoi) OR (mai hoi)). bieu hien cac lo van anh ((giau cua) or (gian cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky nang ((ma hoi) OR (mai hoi)). bieu hien cac lo van anh ((giau cua) OR (gian cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ky nang ((ma hoi) OR (mai hoi)). bieu hien cac lo van anh ((giau cua) or (gian cua)) tre".
• Adding a wildcard symbol may retrieve word variants: thu sach ky nang ((ma hoi) OR (mai hoi)). bieu hien cac lo van anh ((giau cua) or (gian cua)) tre*.