Perhaps you should try some spelling variations:
danh dai » danh dau, danh sai, vanh dai
tu sach » thu sach, su sach, te sach
danh di » danh du, xanh di, danh dien
sach ky » sac ky, sach y, sach ty
hiem he » hiem xe, hieu he, thien he
cua tre » cua te, cuu tre, cua triet
tang ma » mang may, tang van
nang ma » sang ma, nang cao, mang may
thu xa » thu xac, thu ha, thu xe
he nam » ha nam, nghe nam

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 ky ((nang ma) or (tang ma)) hoi. hiem he nam thu xa ((danh dai) OR (danh di)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky ((nang ma) OR (tang ma)) hoi. hiem he nam thu xa ((danh dai) OR (danh di)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky ((nang ma) or (tang ma)) hoi. hiem he nam thu xa ((danh dai) OR (danh di)) cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ky ((nang ma) or (tang ma)) hoi. hiem he nam thu xa ((danh dai) OR (danh di)) cua tre*.