Perhaps you should try some spelling variations:
hoach ngan » hoach toan, doanh ngan, hoach luan
khau sach » hau sach, khoa sach, pham sach
nhan lky » nhan ky, nhan luc, nhan y
tu sach » thu sach, su sach, te sach
lky khi » ly khi, ky khi
ngan y » nganh y, nhan y, nganh ky
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 ngan y khi đong luc ) or ( ((tu sach) or (khau sach)) nhan lky khi đong luc ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( thu hoach ngan y khi đong luc ) OR ( ((tu sach) OR (khau sach)) nhan lky khi đong luc )).
• Adding a wildcard symbol may retrieve word variants: (( thu hoach ngan y khi đong luc ) or ( ((tu sach) or (khau sach)) nhan lky khi đong luc ))*.