Perhaps you should try some spelling variations:
khong trong » khoang trong, thong trong, phong trong
dieu tinh » diep tinh, lieu tinh, dien tinh
trung hua » trung hoa, trung cua, trung huy
trong ban » trong san, trong tan, trong quan
cho dieu » cao dieu, co dieu, khoa dieu
trung ha » trung hoc, trung tam, trung cap
than cau » toan cau, phan cau, thanh chau
than cap » khan cap, thanh lap, thanh cac

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: cho dieu tinh - thanh ((trung hua) OR (trung ha)) khong trong ban ((than cau) OR (than cap))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "cho dieu tinh - thanh ((trung hua) or (trung ha)) khong trong ban ((than cau) OR (than cap))~".
• Adding a wildcard symbol may retrieve word variants: cho dieu tinh - thanh ((trung hua) or (trung ha)) khong trong ban ((than cau) OR (than cap))*.