Perhaps you should try some spelling variations:
sach trinh » sach tranh, hanh trinh, sach kinh
sach tran » sach tranh, sach tren, vach tran
tran quoc » trung quoc, han quoc, tran duc
quoc khi » buoc khoi, quoc thai, cuoc khoi
trinh co » trinh do, trinh cong, trinh hoa
su sach » vu sach
so sach » so sanh, bo sach, co sach

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( su sach tran quoc khi đong luc ) or ( so sach trinh co khi đong luc ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( su sach tran quoc khi đong luc ) OR ( so sach trinh co khi đong luc )).
• Adding a wildcard symbol may retrieve word variants: (( su sach tran quoc khi đong luc ) or ( so sach trinh co khi đong luc ))*.