Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sang » chieu sach, chieu xanh, nhieu tang
trong xuan » truong xuan, trong quan, thong xuan
hieu lang » hieu quang, nhieu tang, biet lang
hieu van » hieu va, thien van, lieu va
tam dung » tam duong, tac dung, tan dung
toan cau » toan cao, toan ban, toan tap

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) OR (hieu van))) or (chieu sang)) - thanh trung tam dung trong xuan toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((((hieu lang) OR (hieu van))) OR (chieu sang)) - thanh trung tam dung trong xuan toan cau*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((((hieu lang) OR (hieu van))) or (chieu sang)) - thanh trung tam dung trong xuan toan cau*".