Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
thu phuong » thi phuong, thu huong, theo phuong
phuong dan » phuong danh, phuong doan, huong dan
hien hanh » dieu hanh
quang cua » quan cua, quang tuan, quang huy
toan cao » toan tap
toan ban » van ban
cua thu » cua chu, ca thu, cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((hien hanh) or (chieu xanh)) - nhanh quang cua thu phuong dan ((toan cao) OR (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien hanh) OR (chieu xanh)) - nhanh quang cua thu phuong dan ((toan cao) OR (toan ban))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien hanh) or (chieu xanh)) - nhanh quang cua thu phuong dan ((toan cao) OR (toan ban))*".