Perhaps you should try some spelling variations:
thanh trung » thanh tung
tuong thong » tong thong, tuong tuong, tuong tong
chieu sang » chieu sach, chieu xanh, nhieu tang
hieu lang » hieu quang, nhieu tang, hieu van
trung doi » trung dai, trong doi, trung do
dan phan » doan phan, dan chan, van phan
phan cac » nhan cach, phan dau, phan lap

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)) - thanh trung doi ((tuong thong) OR (thong thong)) dan phan cac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sang) OR (hieu lang)) - thanh trung doi ((tuong thong) OR (thong thong)) dan phan cac.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu sang) or (hieu lang)) - thanh trung doi ((tuong thong) OR (thong thong)) dan phan cac".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sang) or (hieu lang)) - thanh trung doi ((tuong thong) OR (thong thong)) dan phan cac*.