Perhaps you should try some spelling variations:
thanh dai » thanh hai, thanh tai, thanh oai
thanh dat » thanh san, thanh hai, thanh van
thu sach » tu sach, thuat sach, thuoc sach
nang mai » nang ma, nang tai, lang mai
sach ky » sac ky, sach y, sach ty
mai hoi » mai khoi, dai hoi, lai hoi
hieu ve » hieu va, hieu van
cua tre » cua te, cuu tre, cua triet
ve cam » ve cham, ve cac, va cam
xuc va » tuc va, luc va, xac va

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ky nang mai hoi. hieu ve cam ((xuc va) OR (duc va)) ((thanh dai) or (thanh dat)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky nang mai hoi. hieu ve cam ((xuc va) OR (duc va)) ((thanh dai) OR (thanh dat)) cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ky nang mai hoi. hieu ve cam ((xuc va) OR (duc va)) ((thanh dai) or (thanh dat)) cua tre*".