Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, hieu manh
chieu tinh » trieu tinh, lieu tinh, chau tinh
thong tan » thong than, thong tran, thong tin
trung va » truong va, trang va, trung tam
trung ha » trung hoc, trung tam, trung cap
tan toan » tan tran, tap toan, van toan
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 ((chieu xanh) or (chieu tinh)) - thanh ((trung va) OR (trung ha)) thong thong tan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu xanh) OR (chieu tinh)) - thanh ((trung va) OR (trung ha)) thong thong tan toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu xanh) or (chieu tinh)) - thanh ((trung va) OR (trung ha)) thong thong tan toan cao".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu xanh) or (chieu tinh)) - thanh ((trung va) OR (trung ha)) thong thong tan toan cao*.