Perhaps you should try some spelling variations:
mach trinh » hanh trinh, sach tranh, mach tich
trinh chao » trinh chat, trinh han, trinh co
hoc sach » hoc sinh, hoc cac, hoc anh
bo sach » co sach
kinh su » kinh suu, hinh su, dinh su
so giao » so giai, hoc giao
tu mach » tu cach, tu manh, tu hach

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( ((bo sach) OR (hoc sach)) kinh su - so giao ) or ( tu mach trinh chao - so giao ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( ((bo sach) OR (hoc sach)) kinh su - so giao ) OR ( tu mach trinh chao - so giao )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( ((bo sach) OR (hoc sach)) kinh su - so giao ) or ( tu mach trinh chao - so giao ))".
• Adding a wildcard symbol may retrieve word variants: (( ((bo sach) OR (hoc sach)) kinh su - so giao ) or ( tu mach trinh chao - so giao ))*.