Perhaps you should try some spelling variations:
can thong » ban thong, van thong, chan thuong
mach cua » manh cua, menh cua, hanh cua
giai can » giai han, giai san, giai ca
cham den » cham nen, thai den, chat deo
hoc sach » hoc sinh, hoc cac, hoc anh
co thong » bo thong, co trong, co phong
cham de » chem de, chat deo, cham nen
gian co » gian o, gian cua, gian cac
su gian » su giao, su giau, duy gian
tu mach » tu cach, tu manh, tu hach
cua su » qua su

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( tu mach cua su gian co thong tin ) or ( hoc sach ((cham de) or (cham den)) giai can thong tin ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu mach cua su gian co thong tin ) OR ( hoc sach ((cham de) OR (cham den)) giai can thong tin )).
• Adding a wildcard symbol may retrieve word variants: (( tu mach cua su gian co thong tin ) or ( hoc sach ((cham de) or (cham den)) giai can thong tin ))*.