Perhaps you should try some spelling variations:
can thong » ban thong, van thong, chan thuong
cong tinh » cong trinh, cong vinh, long tinh
sach che » sach thue, sach nha, sach cap
gioi can » gioi van, gioi cam, gioi cau
cua test » a test, cua te
giai bon » gioi bon, giai doan, giai bai
bon cong » bo cong, ban cong, bot cong
te sach » toc sach
my gioi » moi gioi
tu sach » thu sach, su sach, tu cach

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( te sach che my gioi can thong tin ) or ( tu sach ((cua test) OR (cua mes)) giai bon cong tinh ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( te sach che my gioi can thong tin ) OR ( tu sach ((cua test) OR (cua mes)) giai bon cong tinh )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( te sach che my gioi can thong tin ) or ( tu sach ((cua test) OR (cua mes)) giai bon cong tinh ))".
• Adding a wildcard symbol may retrieve word variants: (( te sach che my gioi can thong tin ) or ( tu sach ((cua test) OR (cua mes)) giai bon cong tinh ))*.