Perhaps you should try some spelling variations:
thu nang » thi nang, thu hang, thu bang
sach thu » sach thue, sach thieu, sach tham
tu sach » thu sach, su sach, te sach
cau tuc » cau truc, cau tu, cau luc
hieu ve » hieu van
va tinh » may tinh
hieu va » lieu va, hieu qua
da cuu » da cau, da cua, da suu
tuc va » thuc va, truc va, tuc xa
x hoi » xa hoi, o hoi, x ho
da cu » da cau, dan cu, da cua

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: tu sach thu nang x hoi. ((hieu ve) OR (hieu va)) cau tuc va tinh ((da cuu) OR (da cu)) tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach thu nang x hoi. ((hieu ve) or (hieu va)) cau tuc va tinh ((da cuu) OR (da cu)) tre~".
• Adding a wildcard symbol may retrieve word variants: tu sach thu nang x hoi. ((hieu ve) or (hieu va)) cau tuc va tinh ((da cuu) OR (da cu)) tre*.