Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hinh thong » hinh trong, dinh thong, hinh chong
thong dung » thong cong, thong thuong
trong dang » truong dang, trong dan, trong dong
hieu lang » chieu sang, hieu quang, nhieu tang
tinh hinh » tinh ninh, tinh binh, linh chinh
dang phan » dung phan, nang phan, dang phat

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) or (chieu sach)) - tinh hinh thong dung trong dang phan tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((hieu lang) OR (chieu sach)) - tinh hinh thong dung trong dang phan tu.
• Adding a wildcard symbol may retrieve word variants: doi ((hieu lang) or (chieu sach)) - tinh hinh thong dung trong dang phan tu*.