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 minh duc gia tuong" » "so sach danh duc gia tuong", "so sac tinh duc gia tuong", "so cach kinh duc gia tuong", "so sach minh duc gia cuong", "so sach minh duc gia cong", "so sach minh duc gia tang", "so sanh minh duc gia tuong", "bo sach minh duc gia tuong", "co sach minh duc gia tuong", "so sach minh quoc 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 minh duc gia tuong"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"so sach kinh bi gian muong\") OR (\"so sach minh duc gia tuong\"))".
• Removing quotes may allow a broader search: (( so sach kinh bi gian muong ) OR ( so sach minh duc gia tuong )).
• Adding a wildcard symbol may retrieve word variants: (("so sach kinh bi gian muong") OR ("so sach minh duc gia tuong"))*.