Perhaps you should try some spelling variations:
thanh trung » thanh tung
trong manh » trong minh, trong anh, trong canh
trong mach » trong cac, trong minh, trong anh
hieu lang » chieu sang, hieu quang, nhieu tang
trung qua » trung quan, trong qua, trung cua
qua dung » quang dung, su dung, qua song
toan tap » toan ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((hieu lang) or (hieu qua)) - thanh trung qua dung ((trong manh) OR (trong mach)) toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((hieu lang) OR (hieu qua)) - thanh trung qua dung ((trong manh) OR (trong mach)) toan tap*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((hieu lang) or (hieu qua)) - thanh trung qua dung ((trong manh) OR (trong mach)) toan tap*".