Perhaps you should try some spelling variations:
nganh xakmmy » nganh xay
can tranh » canh tranh, tan tran, van ranh
tranh sy » tran sy, tran si, trang su
tu sach » thu sach, su sach, tu cach
te sach » toc sach
su can » su van, su cao, tu can
sy 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: (( su can tranh sy khi đong luc ) or ( ((tu sach) OR (te sach)) nganh xakmmy khi đong luc ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( su can tranh sy khi đong luc ) OR ( ((tu sach) OR (te sach)) nganh xakmmy khi đong luc ))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( su can tranh sy khi đong luc ) or ( ((tu sach) OR (te sach)) nganh xakmmy khi đong luc ))*".