Perhaps you should try some spelling variations:
chieu tinh » trieu tinh, lieu tinh, chau tinh
lang trong » dung trong, cong trong, dong trong
hieu lang » chieu sang, hieu quang, nhieu tang
dang cong » dung cong
trong ca » trong cac, trong nha
cong sat » cong suat, cong san, cong hat
sat phan » sat nhan, vat phan, xuat phan
phan van » pham van, thanh van, luan van
ca dang » cao dang, cua dang, cac dang

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc ((chieu tinh) or (hieu lang)) - lang trong ca dang cong sat phan van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc ((chieu tinh) OR (hieu lang)) - lang trong ca dang cong sat phan van*.