Perhaps you should try some spelling variations:
sach thanh » danh thanh, sach danh, bac thanh
sach tranh » canh tranh
nghe thong » he thong
thong tinh » thuong tinh, thong tin, thong minh
cac truyen » tac truyen, cay truyen, nhac truyen
sach tham » sach nha
tinh cac » tinh cach, trinh cac, tich cac

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 thanh) or (sach tranh))) or (sach tham)) cong nghe thong tinh cac truyen thong~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((((sach thanh) OR (sach tranh))) OR (sach tham)) cong nghe thong tinh cac truyen thong.
• Adding a wildcard symbol may retrieve word variants: tu ((((sach thanh) or (sach tranh))) or (sach tham)) cong nghe thong tinh cac truyen thong*.