Perhaps you should try some spelling variations:
thanh trung » thanh tung
thieu xanh » chieu xanh, hieu manh, thien anh
chieu sach » chinh sach, chiet tach, chieu sang
thong song » thong cong, thong dong, thong hong
trung he » trung ha, trong he, trung hieu
song van » hoang van, trong van, duong van
tuan tap » toan tap, tuyen tap, toan tai
tuan tai » toan tai, quan tai, tan tai

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 sach)) - thanh trung he thong song van ((tuan tap) OR (tuan tai))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu xanh) OR (chieu sach)) - thanh trung he thong song van ((tuan tap) OR (tuan tai)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu xanh) or (chieu sach)) - thanh trung he thong song van ((tuan tap) OR (tuan tai))".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu xanh) or (chieu sach)) - thanh trung he thong song van ((tuan tap) OR (tuan tai))*.