Perhaps you should try some spelling variations:
cach nhanh » cac nganh, cac nhan, cac thanh
nhanh cong » nhanh chong, thanh cong, nganh cong
tu cach » tu cac
cong vi » chong vi, cong va, cong li
tu sach » thu sach, te sach, vu sach
su sach » so sach, vu sach
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: (( tu cach nhanh cong vi đong luc ) or ( ((tu sach) or (su sach)) nganh y khi đong luc ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu cach nhanh cong vi đong luc ) OR ( ((tu sach) OR (su sach)) nganh y khi đong luc )).
• Adding a wildcard symbol may retrieve word variants: (( tu cach nhanh cong vi đong luc ) or ( ((tu sach) or (su sach)) nganh y khi đong luc ))*.