Perhaps you should try some spelling variations:
thanh lai » thanh hai, thanh lap, thanh loi
toc sach » hoc sach, doc sach, thuoc sach
phan lap » phan dau
duc ban » duc tan, duc van, dua ban
ve giao » te giao, viet giao, van giao
hieu ve » hieu va, hieu van
nang ma » tang ma, sang ma, nang cao
cua tre » cua te, cuu tre, cua triet
ma hoi » mai hoi, xa hoi, ma hoa
y nang » ky nang, ly nang, v nang

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((te sach) OR (toc sach)) y nang ma hoi. hieu ve giao duc ban ((thanh lai) or (phan lap)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (toc sach)) y nang ma hoi. hieu ve giao duc ban ((thanh lai) OR (phan lap)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) OR (toc sach)) y nang ma hoi. hieu ve giao duc ban ((thanh lai) or (phan lap)) cua tre".
• Adding a wildcard symbol may retrieve word variants: ((te sach) OR (toc sach)) y nang ma hoi. hieu ve giao duc ban ((thanh lai) or (phan lap)) cua tre*.