Perhaps you should try some spelling variations:
"thuat lanh dung tren" » "thuat lap dung tren", "thuat san dung tren", "thuat anh dung tren", "thuat manh dung tren", "thuat lan dung tren", "thuat lanh dung trong", "thuat lanh dung trung"
"quy hoach dinh tren" » "quy hoang dinh tren", "quy hoach dinh trong", "quy hoach dinh tri", "quy hoach dinh dien"
"su sach dau tien" » "su sach dao tien", "su sach dat tien", "su sach mau tien", "su sach van tien", "so sach dau tien", "vu sach dau tien"

Try widening your search to All Fields.

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((("thuat lanh dung tren") or ("quy hoach dinh tren"))) or ("su sach dau tien"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("thuat lanh dung tren") OR ("quy hoach dinh tren"))) OR ("su sach dau tien")).
• Removing quotes may allow a broader search: (((( thuat lanh dung tren ) or ( quy hoach dinh tren ))) or ( su sach dau tien )).
• Adding a wildcard symbol may retrieve word variants: (((("thuat lanh dung tren") or ("quy hoach dinh tren"))) or ("su sach dau tien"))*.