Perhaps you should try some spelling variations:
"toc sach tranh tri" » "toc canh tranh tri", "toc sach trang tri", "toc sach thanh tri", "toc sach tran tri", "hoc sach tranh tri", "doc sach tranh tri", "thuoc sach tranh tri"
"te xac dinh thang" » "te xac dinh thanh", "te xac danh thang", "te xac vinh thang", "te xa dinh thang", "te xay dinh thang", "te cac dinh thang"
"so sach danh thin" » "so sach dao thin", "so sach dung thin", "so sach kinh thin", "so sach canh thin", "so sach danh thanh", "so sach danh thang", "so sanh danh thin", "bo sach danh thin", "co sach danh thin"

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 danh thin") or ((("toc sach tranh tri") or ("te xac dinh thang"))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("so sach danh thin") OR ((("toc sach tranh tri") OR ("te xac dinh thang")))).
• Removing quotes may allow a broader search: (( so sach danh thin ) or ((( toc sach tranh tri ) or ( te xac dinh thang )))).
• Adding a wildcard symbol may retrieve word variants: (("so sach danh thin") or ((("toc sach tranh tri") or ("te xac dinh thang"))))*.