Perhaps you should try some spelling variations:
hoach luan » hoach quang, doanh luan, hoa luan
luan nhay » luan nha, luan nhan, luan phan
sach ngan » sach ngon, sach nha, sach han
nhay khi » nhac khi, thuy khi, chat khi
thu sach » tu sach, thuat sach, thuoc sach
my khi » ly khi, my chi
ky khi » ky thi, ly 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 nhay khi đong luc ) or ( thu sach ngan ((my khi) OR (ky khi)) đong luc ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( thu hoach luan nhay khi đong luc ) OR ( thu sach ngan ((my khi) OR (ky khi)) đong luc )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( thu hoach luan nhay khi đong luc ) or ( thu sach ngan ((my khi) OR (ky khi)) đong luc ))".
• Adding a wildcard symbol may retrieve word variants: (( thu hoach luan nhay khi đong luc ) or ( thu sach ngan ((my khi) OR (ky khi)) đong luc ))*.