Perhaps you should try some spelling variations:
phuong tung » phuong dung, chuong trung, phuong duong
thanh trung » thanh tung
chieu xanh » chieu sach, chieu sang, chieu tinh
doi chieu » doc hieu, doi chi, ho chieu
va phuong » va thuong, cac phuong
trung va » truong va, trang va, trung ha
tung dan » dung dan, huong dan, trung dai
than tap » toan tap, han tap, than cap
phan tap » phan lap, han tap, pha tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chieu xanh - thanh trung va phuong tung dan ((than tap) OR (phan tap))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu xanh - thanh trung va phuong tung dan ((than tap) OR (phan tap))*".