Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
cua triet » cua viet, su triet, va triet
ban thanh » ban hanh, ban hang
thanh va » thanh van, hanh va, thanh ha
thu sach » tu sach, thuat sach, thu hoach
nang ha » nang hai, nang han, nang hoa
xuc ban » duc ban, cuc ban, quoc ban
ha hoi » hoa hoi, ha noi, xa hoi
va cao » va cac, va co, va dao
va cua » va chua, via cua, ca cua
va cam » va cham, va cac, va cai

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) or (thuoc sach)) ky nang ha hoi. hieu ((va cam) OR (va cao)) xuc ban thanh va cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (thuoc sach)) ky nang ha hoi. hieu ((va cam) OR (va cao)) xuc ban thanh va cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sach) or (thuoc sach)) ky nang ha hoi. hieu ((va cam) OR (va cao)) xuc ban thanh va cua triet".
• Adding a wildcard symbol may retrieve word variants: ((thu sach) or (thuoc sach)) ky nang ha hoi. hieu ((va cam) OR (va cao)) xuc ban thanh va cua triet*.