Perhaps you should try some spelling variations:
hoach luan » hoach quang, doanh luan, hoa luan
thu sach » thuat sach, thuoc sach, khau sach
nhan lky » nhan ky, nhan luc, nhan y
tu sach » su sach, te sach, tu cach
lky khi » ly khi, ky khi
luan y » quan y, luan quy, luan xay
y khi » ly khi, ky khi, my khi

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( thu hoach luan y khi đong luc ) or ( ((tu sach) or (thu sach)) nhan lky khi đong luc ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( thu hoach luan y khi đong luc ) OR ( ((tu sach) OR (thu sach)) nhan lky khi đong luc )).
• Adding a wildcard symbol may retrieve word variants: (( thu hoach luan y khi đong luc ) or ( ((tu sach) or (thu sach)) nhan lky khi đong luc ))*.