Perhaps you should try some spelling variations:
hoach lang » hoach bang, hoach mang, hoach quang
sach luan » sach luyen, sach han, san luan
tuan tai » toan tai, quan tai, tan tai
lang tri » nang tri, quang tri, trang tri
luan tri » quan tri, luan thi, luat tri
so sach » so sanh, bo sach, co sach
su anh » sua anh, vu anh, tu anh

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((( su anh tuan tai ) or ( quy hoach lang tri ))) or ( so sach luan tri ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((( su anh tuan tai ) OR ( quy hoach lang tri ))) OR ( so sach luan tri )).
• Adding a wildcard symbol may retrieve word variants: (((( su anh tuan tai ) or ( quy hoach lang tri ))) or ( so sach luan tri ))*.