Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
va triet » va thiet, va trien, ve triet
thanh xa » thanh ha, thanh va, thanh ba
van hanh » van thanh, ban hanh, van anh
truc van » truc va, thuc van, truc ban
hanh va » hang va, hanh vi
tu cach » tu cac
va cao » va cac, va co, va dao
ve cam » ve cham, ve cac, va cam
va va » va van, va vua, va vai

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu cach) or (thuoc sach)) thi thanh xa hoi. hieu ((ve cam) or (va cao)) truc van hanh va va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cach) OR (thuoc sach)) thi thanh xa hoi. hieu ((ve cam) OR (va cao)) truc van hanh va va triet.
• Adding a wildcard symbol may retrieve word variants: ((tu cach) or (thuoc sach)) thi thanh xa hoi. hieu ((ve cam) or (va cao)) truc van hanh va va triet*.