Perhaps you should try some spelling variations:
chat duc » chat xuc, chat doc, chet duoc
van tuan » van quan, van ban, anh tuan
so sach » so sanh, bo sach, co sach
ky dang » ky danh
hieu ve » hieu va, hieu van
ve chat » va chat, van chat
duc van » duc va, duc tan, duc manh
cua tre » cua te, cuu tre, cua triet
le cua » ly cua

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 ((ky dang) OR (ky nang)) xa hoi. hieu ve chat duc van tuan le cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ((ky dang) OR (ky nang)) xa hoi. hieu ve chat duc van tuan le cua tre".
• Adding a wildcard symbol may retrieve word variants: so sach ((ky dang) OR (ky nang)) xa hoi. hieu ve chat duc van tuan le cua tre*.