Perhaps you should try some spelling variations:
thanh va » thanh van, hanh va, thanh ha
va thanh » gia thanh, ban thanh, va tinh
so sach » so sanh, bo sach, hoc sach
co sach » bo sach, cuon sach, hoc sach
ky dang » ky nang, ky danh
dang ha » dong ha, dung ha, lang ha
va cua » va chua, via cua, ca cua
xuc va » duc va, tuc va, luc va
va cai » va cac, va bai, va dai
va cao » va cac, va co, va dao
ha hoi » hoa hoi, ha noi, xa hoi
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((so sach) OR (co sach)) ky dang ha hoi. hieu ((va cai) or (va cao)) xuc va thanh va cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so sach) OR (co sach)) ky dang ha hoi. hieu ((va cai) OR (va cao)) xuc va thanh va cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((so sach) OR (co sach)) ky dang ha hoi. hieu ((va cai) or (va cao)) xuc va thanh va cua te".
• Adding a wildcard symbol may retrieve word variants: ((so sach) OR (co sach)) ky dang ha hoi. hieu ((va cai) or (va cao)) xuc va thanh va cua te*.