Perhaps you should try some spelling variations:
trung cong » truong cong, trong cong, trung uong
chieu sang » chieu sach, chieu xanh, hieu lang
hanh sinh » hanh tinh, hanh dinh, hinh sinh
ho chieu » theo chieu, hoc thieu, doi chieu
va trung » ba trung, ha trung, va thuong
dan toan » manh toan, xuan toan, dien toan
dan than » dan chan, ban than, van than
van toan » van tuan, van tan, van thanh
sinh va » sinh vat, tinh va, dinh van

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 - hanh sinh va trung cong ((((dan toan) or (dan than))) or (van toan)) tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sang - hanh sinh va trung cong ((((dan toan) OR (dan than))) OR (van toan)) tap.
• Adding a wildcard symbol may retrieve word variants: ho chieu sang - hanh sinh va trung cong ((((dan toan) or (dan than))) or (van toan)) tap*.