Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
sach thu » sach thue, sach thieu, sach tham
tinh hai » tinh thai, tinh chat, trinh han
thu sach » tu sach, thuat sach, thuoc sach
thu nang » thi nang, thu hang, thu bang
hieu ve » hieu va, hieu van
cau tuc » cau truc, cau luc, cau phuc
hai cua » thai cua, dai cua, hoi cua
cau tu » dau tu, cau truc
x hoi » xa hoi, o hoi, x ho

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 thu nang x hoi. ((hieu ve) or (hieu qua)) ((cau tuc) or (cau tu)) may tinh hai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach thu nang x hoi. ((hieu ve) OR (hieu qua)) ((cau tuc) OR (cau tu)) may tinh hai cua triet.
• Adding a wildcard symbol may retrieve word variants: thu sach thu nang x hoi. ((hieu ve) or (hieu qua)) ((cau tuc) or (cau tu)) may tinh hai cua triet*.