Perhaps you should try some spelling variations:
thanh lap » thanh san, thanh hai, thanh van
phan lap » phan dau
te sach » toc sach
sach ky » sac ky, sach y, sach ty
duc ban » duc tan, duc van, dua ban
cua tre » cua te, cuu tre, cua triet
ve giao » te giao, van giao
tang ma » mang may, tang van
ky tang » ky nang, ky dang, kho tang
ma hoi » mai hoi, xa hoi, ma hoa

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