Perhaps you should try some spelling variations:
sach tranh » canh tranh
cach ngan » cac ngan, sach ngan, cach nhanh
tu cach » tu cac
te sach » toc sach
tranh o » tranh co, trang o, trinh o
ngan y » nganh y, nhan y, nganh ky
y khi » ly khi, ky khi, my khi
o khi » co khi, bo 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 ngan y khi đong luc ) or ( te sach tranh o khi đong luc ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tu cach ngan y khi đong luc ) OR ( te sach tranh o khi đong luc )).
• Adding a wildcard symbol may retrieve word variants: (( tu cach ngan y khi đong luc ) or ( te sach tranh o khi đong luc ))*.