Perhaps you should try some spelling variations:
thanh trung » thanh tung
cong ngang » cong nhan, cong lang, cong nong
cong quang » luong quang, thong quang, duong quang
hieu lang » chieu sang, hieu quang, nhieu tang
trung va » truong va, trang va, trung ha
than cau » toan cau, phan cau, thanh chau
than cap » khan cap, thanh lap, thanh cac
ho hieu » ho chieu, hoi hieu, nho hieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho hieu lang - thanh trung va nhung ((cong ngang) or (cong quang)) ((than cau) OR (than cap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho hieu lang - thanh trung va nhung ((cong ngang) OR (cong quang)) ((than cau) OR (than cap)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho hieu lang - thanh trung va nhung ((cong ngang) or (cong quang)) ((than cau) OR (than cap))".
• Adding a wildcard symbol may retrieve word variants: ho hieu lang - thanh trung va nhung ((cong ngang) or (cong quang)) ((than cau) OR (than cap))*.