Perhaps you should try some spelling variations:
duong manh » duong van
hoc thieu » toc thieu, hoc hien
quang cua » quan cua, quang tuan, quang huy
cua nhung » va nhung
cong manh » cong danh, cong thanh, hoang manh
ho chieu » theo chieu, doi chieu, mot chieu
toan cau » 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: ((ho chieu) OR (hoc thieu)) sach - nhanh quang cua nhung ((cong manh) or (duong manh)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (hoc thieu)) sach - nhanh quang cua nhung ((cong manh) OR (duong manh)) toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) OR (hoc thieu)) sach - nhanh quang cua nhung ((cong manh) or (duong manh)) toan cau".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) OR (hoc thieu)) sach - nhanh quang cua nhung ((cong manh) or (duong manh)) toan cau*.