Perhaps you should try some spelling variations:
thanh trung » thanh tung
cong ngang » cong quang, cong lang, cong nong
thanh chau » thanh cha, thanh cham, thanh chu
hien xanh » hien nhanh, chieu xanh, hien khanh
hien hanh » dieu hanh
trung cap » truong cao, trung tam
cap thong » cap tong, chap thuong, phap thong
cong nhan » cong nhat, cong thanh, cong san

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((hien xanh) OR (hien hanh)) - thanh trung cap thong ((cong ngang) or (cong nhan)) thanh chau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien xanh) OR (hien hanh)) - thanh trung cap thong ((cong ngang) OR (cong nhan)) thanh chau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien xanh) OR (hien hanh)) - thanh trung cap thong ((cong ngang) or (cong nhan)) thanh chau".
• Adding a wildcard symbol may retrieve word variants: hoc ((hien xanh) OR (hien hanh)) - thanh trung cap thong ((cong ngang) or (cong nhan)) thanh chau*.