Perhaps you should try some spelling variations:
"so sach kinh bi gian muong" » "so sach kinh bi giang duong", "so sach kinh bi gian trong", "so sanh kinh bi gian muong", "bo sach kinh bi gian muong", "co sach kinh bi gian muong", "so sach kinh i gian muong", "so sach hinh bai gian muong", "so sach kinh bac gian muong", "so sach kinh bi gia muong", "so sach kinh bi giao muong", "so sach kinh bai giang muong"
"so sach dao di gia tuong" » "so sach dao di gia cuong", "so sach dao di gia cong", "so sach dao di gia tang", "so lanh dao di gia tuong", "so sanh dao di gia tuong", "bo sach dao di gia tuong", "co sach dao di gia tuong", "so sach dao do gia tuong", "so sach dao du gia tuong", "so sach dao li gia tuong", "so sach dao bi gia tuong", "so sach dao de gia tuong"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("so sach kinh bi gian muong") or ("so sach dao di gia tuong"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("so sach kinh bi gian muong") OR ("so sach dao di gia tuong")).
• Removing quotes may allow a broader search: (( so sach kinh bi gian muong ) or ( so sach dao di gia tuong )).
• Adding a wildcard symbol may retrieve word variants: (("so sach kinh bi gian muong") or ("so sach dao di gia tuong"))*.