Perhaps you should try some spelling variations:
"bo sach phat tri" » "bo sach nha tri", "bo sach tham tri", "bo cach pha tri", "bo sach phat trien", "bo sach phai trai", "bo sach phat vi", "co sach phat tri", "hoc sach phat tri"
"vu sach luat tri" » "vu sach luan tri", "vu sach dat tri", "vu hanh luat tri", "vu sach luat thi", "vu sach luat thai", "vu sach quan tri", "vu bach luat tri", "su sach luat tri", "vu khach luat tri"
"vu sach dao tai" » "vu lanh dao tai", "vu bach dao tai", "su sach dao tai", "vu khach dao tai", "vu sach dao thai", "vu sach dao tao", "vu sach cao tai"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((("vu sach luat tri") OR ("vu sach dao tai"))) OR ("bo sach phat tri"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"vu sach luat tri\") OR (\"vu sach dao tai\"))) OR (\"bo sach phat tri\"))".
• Removing quotes may allow a broader search: (((( vu sach luat tri ) OR ( vu sach dao tai ))) OR ( bo sach phat tri )).
• Adding a wildcard symbol may retrieve word variants: (((("vu sach luat tri") OR ("vu sach dao tai"))) OR ("bo sach phat tri"))*.