Perhaps you should try some spelling variations:
thu nang » thi nang, thu hang, thu bang
sach thu » sach thue, sach thieu, sach tham
su sach » so sach, vu sach
cuu ban » cuu van, cua ban, cuu san
hieu va » lieu va, hieu qua
cuc ban » cua ban, cac ban, duc ban
de cua » le cua, te cua, dieu cua
va cao » va cac, va co, va dao
d cua » do cua, da cua, di cua
x hoi » xa hoi, o hoi, x ho

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

• If you are trying to use Boolean operators, they must be ALL CAPS: su sach thu nang x hoi. hieu va cao ((cuc ban) OR (cuu ban)) danh ((d cua) OR (de cua)) te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach thu nang x hoi. hieu va cao ((cuc ban) OR (cuu ban)) danh ((d cua) or (de cua)) te~".
• Adding a wildcard symbol may retrieve word variants: su sach thu nang x hoi. hieu va cao ((cuc ban) OR (cuu ban)) danh ((d cua) or (de cua)) te*.