Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
ban hanh » ban hang
va triet » va thiet, va trien, ve triet
thu bang » thu ban, thu hang, chu bang
phu lang » phap lang, phu khang, phu luong
hien tu » khien tu, dien tu
cham so » cham soc, cham o, cham hoi
ham so » nam so, cham soc
vi va » vi van, vai va, vu va

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 bang) or (phu lang)) xa hoi. hien tu ((cham so) OR (ham so)) ban hanh vi va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ((thu bang) OR (phu lang)) xa hoi. hien tu ((cham so) OR (ham so)) ban hanh vi va triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ((thu bang) or (phu lang)) xa hoi. hien tu ((cham so) OR (ham so)) ban hanh vi va triet".
• Adding a wildcard symbol may retrieve word variants: thu sach ((thu bang) or (phu lang)) xa hoi. hien tu ((cham so) OR (ham so)) ban hanh vi va triet*.