Perhaps you should try some spelling variations:
nganh khong » nganh cong, nhanh chong, nganh nong
ngan khong » nhan khong, ngan hang, ga khong
canh nganh » canh tranh, cac nganh, canh ngon
sach ngan » sach ngon, sach nha, sach han
khong khi » khong he
thu canh » thuc hanh, thu cong, thu ban
su sach » so sach, vu sach

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( su sach ngan khong khi đong luc ) or ( thu canh nganh khong khi đong luc ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( su sach ngan khong khi đong luc ) OR ( thu canh nganh khong khi đong luc ))*.