Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
duc manh » suc manh, duc anh, duc minh
dang hai » dang khai, hang hai, dung hai
hieu van » hieu va, thien van, lieu va
danh hai » lanh hai, manh hai, danh hau
cua tre » cua te, cuu tre, cua triet
sach ky » sac ky, sach y, sach ty
xuc ban » duc ban, cuc ban, quoc ban
van cam » van nam, van lam, van cau
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang

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 lang xa hoi. hieu van cam ((xuc ban) or (duc manh)) ((danh hai) OR (dang hai)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky lang xa hoi. hieu van cam ((xuc ban) OR (duc manh)) ((danh hai) OR (dang hai)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ky lang xa hoi. hieu van cam ((xuc ban) or (duc manh)) ((danh hai) OR (dang hai)) cua tre".
• Adding a wildcard symbol may retrieve word variants: thu sach ky lang xa hoi. hieu van cam ((xuc ban) or (duc manh)) ((danh hai) OR (dang hai)) cua tre*.