Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
thuat cong » thuat song, thuat trong, thuat co
phan tang » phap tang, phan dang, phan cang
ho chieu » theo chieu, hoc thieu, doi chieu
dan toan » van toan, manh toan, xuan toan
dan than » dan chan, ban than, van than

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 sang - phan tang ((thuat cong) or (thu cong)) cong ((dan toan) OR (dan than)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sang - phan tang ((thuat cong) OR (thu cong)) cong ((dan toan) OR (dan than)) cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu sang - phan tang ((thuat cong) or (thu cong)) cong ((dan toan) OR (dan than)) cao".
• Adding a wildcard symbol may retrieve word variants: ho chieu sang - phan tang ((thuat cong) or (thu cong)) cong ((dan toan) OR (dan than)) cao*.