Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu tinh, hieu manh
chieu sang » chieu sach, hieu lang, nhieu tang
thanh tung » thanh cong
tong thong » thong thong, dong thong, cong thong
thong tran » thong than, thong tren, phuong tran
tran toan » tranh toan, tran tuan, tran tan
cua tong » cua cong, cua dong, cua nong
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: hoc ((chieu xanh) OR (chieu sang)) - ((thanh trung) or (thanh tung)) cua tong thong tran toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu xanh) OR (chieu sang)) - ((thanh trung) OR (thanh tung)) cua tong thong tran toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu xanh) OR (chieu sang)) - ((thanh trung) or (thanh tung)) cua tong thong tran toan cao".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu xanh) OR (chieu sang)) - ((thanh trung) or (thanh tung)) cua tong thong tran toan cao*.