Perhaps you should try some spelling variations:
trong chuan » thong chuan, trong chan, trong chuong
trong thuan » trong thuat, trong tuan, trong thuong
chieu sang » chieu sach, chieu xanh, nhieu tang
phan thanh » pham thanh, ban thanh, van thanh
hieu lang » hieu quang, nhieu tang, hieu van
nang dong » nang song, lang dong, nang luong
dong phan » dung phan, cong phan, dong chan
thanh lap » thanh san, phan lap, thanh hai

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