Perhaps you should try some spelling variations:
trong thong » trong thuong, thong thong, tong thong
nhieu tang » chieu sang, hieu lang, nhiet nang
chieu sach » chinh sach, chiet tach, chieu sang
thong dan » thong van, tuong dan, thong den
trung ca » trung cap, truong ca, trung cua
dan phan » doan phan, dan chan, van phan
tung ca » tang ca, cung ca, hung ca

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

• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((nhieu tang) OR (chieu sach)) - thanh ((tung ca) OR (trung ca)) trong thong dan phan tu~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((nhieu tang) or (chieu sach)) - thanh ((tung ca) OR (trung ca)) trong thong dan phan tu~".
• Adding a wildcard symbol may retrieve word variants: doi ((nhieu tang) or (chieu sach)) - thanh ((tung ca) OR (trung ca)) trong thong dan phan tu*.