Perhaps you should try some spelling variations:
trong thanh » truong thanh, trung thanh, rong thanh
thanh thong » thanh thuong, thanh hong, thanh thang
lang trong » dung trong, cong trong, dong trong
duong dang » dung dang, duong dan, duong dung
dung nang » dun nang, dung dang, dung quang
chi danh » chi dan, chi anh, chi dinh
doi chi » doi khi

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chi danh - lang trong thanh thong ((duong dang) or (dung nang)) phan tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chi danh - lang trong thanh thong ((duong dang) OR (dung nang)) phan tu.
• Adding a wildcard symbol may retrieve word variants: doi chi danh - lang trong thanh thong ((duong dang) or (dung nang)) phan tu*.