Perhaps you should try some spelling variations:
thanh phan » thanh pho, thanh san, thanh toan
thanh vai » thanh hai, thanh van, thanh tai
hay lang » ha lang, tay lang, nhan lang
sach hay » sach han, sach ha, sach nay
tu sach » thu sach, su sach, te sach
dua ban » dia ban, cua ban, qua ban
cua tre » cua te, cuu tre, cua triet
duc ban » duc tan, duc van, duc man
hieu va » lieu va, hieu qua
lang xa » lang ha, dang xay, lang van
va cam » va cham, va cac, va cao

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach hay lang xa hoi. hieu va cam ((duc ban) OR (dua ban)) ((thanh vai) or (thanh phan)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach hay lang xa hoi. hieu va cam ((duc ban) OR (dua ban)) ((thanh vai) OR (thanh phan)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach hay lang xa hoi. hieu va cam ((duc ban) OR (dua ban)) ((thanh vai) or (thanh phan)) cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sach hay lang xa hoi. hieu va cam ((duc ban) OR (dua ban)) ((thanh vai) or (thanh phan)) cua tre*.