Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sang » chieu sach, chieu xanh, hieu lang
tuong cong » truong cong, trong cong, tong cong
doi chieu » doc hieu, doi chi, mot chieu
trinh van » trinh han, trinh quan, trinh toan
trung va » truong va, trang va, trung ha
va tuong » va thuong, va thong, xa truong

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chieu sang - thanh trung va tuong cong trinh van ban~.
• Adding a wildcard symbol may retrieve word variants: doi chieu sang - thanh trung va tuong cong trinh van ban*.