Perhaps you should try some spelling variations:
thieu sang » chieu sang, thieu khang, thieu quang
thien quan » trien quang, lien quan, thien van
duong manh » duong van
hanh tinh » hanh trinh, nhanh tinh, thanh tinh
cong manh » cong danh, cong thanh, hoang manh
tinh cua » trinh cua, sinh cua, tinh chat
cua bang » chua bang, cua ban, cua dang
toan tap » toan ban

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 sang) or (thien quan)) - hanh tinh cua bang ((cong manh) OR (duong manh)) toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu sang) OR (thien quan)) - hanh tinh cua bang ((cong manh) OR (duong manh)) toan tap*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu sang) or (thien quan)) - hanh tinh cua bang ((cong manh) OR (duong manh)) toan tap*".