Perhaps you should try some spelling variations:
danh dien » dinh dien, danh kien, danh lien
thu sach » tu sach, thuat sach, thuoc sach
dien cua » dieu cua, dien cuc, dien cu
van hau » van ha, van hai, van dau
va danh » va dinh, va dan, va hanh
truc va » thuc va, thuc vat, trung va
van cau » van dau, van chat, toan cau
sach ky » sac ky, sach y, sach ty
lang xa » lang ha, dang xay, lang van
nang xa » nang x, nang ma, mang xa
cua tre » cua te, cuu tre, cua triet

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 xa) or (lang xa)) hoi. hieu ((van cau) OR (van hau)) truc va danh dien cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky ((nang xa) OR (lang xa)) hoi. hieu ((van cau) OR (van hau)) truc va danh dien cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ky ((nang xa) or (lang xa)) hoi. hieu ((van cau) OR (van hau)) truc va danh dien cua tre*".