Perhaps you should try some spelling variations:
thanh tung » thanh cong
hieu lang » chieu sang, hieu quang, nhieu tang
trong vat » trong van, trong va, trong dat
doi hieu » doi chieu, doc hieu, doi hien
tung cua » trung cua, tuong cua, dung cua
cua dung » cua dang, cua dong, qua dung
vat phan » va phan, van phan, sat phan
phan cau » phan dau, phan cac, phan tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi hieu lang - thanh tung cua dung trong vat phan cau~.
• Adding a wildcard symbol may retrieve word variants: doi hieu lang - thanh tung cua dung trong vat phan cau*.