Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sang » chieu sach, chieu xanh, hieu lang
thong cong » trong cong, tong cong, phong chong
trung cua » truong cua, trung tuan, trung cap
ho chieu » theo chieu, hoc thieu, doi chieu
khan ap » khan cap, khan dam
han ap » han tap, dan ap, han phap

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho chieu sang - thanh trung cua ((thong cong) or (thong thong)) dan ((khan ap) or (han ap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sang - thanh trung cua ((thong cong) OR (thong thong)) dan ((khan ap) OR (han ap)).
• Adding a wildcard symbol may retrieve word variants: ho chieu sang - thanh trung cua ((thong cong) or (thong thong)) dan ((khan ap) or (han ap))*.