Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sang » chieu sach, chieu xanh, nhieu tang
trong tinh » truong tinh, trong kinh, trong sinh
hieu lang » hieu quang, nhieu tang, hieu van
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 ((((chieu sang) OR (hieu lang))) or (hieu qua)) - thanh trung qua dung trong tinh toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((((chieu sang) OR (hieu lang))) OR (hieu qua)) - thanh trung qua dung trong tinh toan tap*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((((chieu sang) OR (hieu lang))) or (hieu qua)) - thanh trung qua dung trong tinh toan tap*".