Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
va triet » va thiet, va trien, ve triet
hanh via » hanh vi, hanh va, anh va
ban hanh » ban hang
va thieu » va thiet, va hieu, va tieu
phu lang » phap lang, phu khang, phu luong
chu bang » thu bang, chuc nang, chu quang
hien tu » khien tu, dien tu
ha hoi » hoa hoi, ha noi, xa hoi
ham so » nam so, cham soc
so ban » sao ban, so bang, co ban
tu ham » tu cham, tu kham, tu tham

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 ((chu bang) or (phu lang)) ha hoi. hien tu ham so ban hanh via ((va triet) or (va thieu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ((chu bang) OR (phu lang)) ha hoi. hien tu ham so ban hanh via ((va triet) OR (va thieu)).
• Adding a wildcard symbol may retrieve word variants: thu sach ((chu bang) or (phu lang)) ha hoi. hien tu ham so ban hanh via ((va triet) or (va thieu))*.