Perhaps you should try some spelling variations:
thanh trung » thanh tung
thieu xanh » chieu xanh, hieu manh, thien anh
chieu sang » chieu sach, chieu xanh, hieu lang
thong dong » thong duong, thuong dong, thong cong
dong thanh » truong thanh
trung cap » truong cao, trung tam
cap thong » cap tong, chap thuong, phap thong
tran tap » toan tap, tran tuan, trang tai
tran tan » tran tuan, tran van, tran thanh

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

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