Perhaps you should try some spelling variations:
truong cong » trong cong, truong dong, truong long
chieu sang » chieu sach, chieu xanh, hieu lang
hanh tranh » canh tranh, hanh trinh, hanh trang
thuong con » thuong dong, thong cong, thuong chi
ho chieu » theo chieu, hoc thieu, doi chieu
tranh va » tranh van, trang va, trinh va
san toan » van toan, dan toan, manh toan
toan ban » van ban

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 tranh va ((truong cong) or (thuong con)) san toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sang - hanh tranh va ((truong cong) OR (thuong con)) san toan ban.
• Adding a wildcard symbol may retrieve word variants: ho chieu sang - hanh tranh va ((truong cong) or (thuong con)) san toan ban*.