Perhaps you should try some spelling variations:
truong cong » trong cong, truong long, truong chung
truong dong » trong dong, truong dang, tuong dong
chieu xanh » chieu sach, chieu sang, chieu tinh
ho chieu » theo chieu, hoc thieu, doi chieu
hanh han » hanh nhan, hanh phan, hanh san
nhan tai » hang tai, van tai, toan tai
han tap » han tai, toan tap, nhan tao
han va » hang va, hanh va, nhan va

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 xanh - hanh han va ((truong cong) OR (truong dong)) dan ((han tap) or (nhan tai))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu xanh - hanh han va ((truong cong) OR (truong dong)) dan ((han tap) OR (nhan tai)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu xanh - hanh han va ((truong cong) OR (truong dong)) dan ((han tap) or (nhan tai))".
• Adding a wildcard symbol may retrieve word variants: ho chieu xanh - hanh han va ((truong cong) OR (truong dong)) dan ((han tap) or (nhan tai))*.