Perhaps you should try some spelling variations:
trinh chuan » trinh han, trinh quan, trinh luan
chieu xanh » chieu sach, chieu sang, chieu tinh
vien nganh » vien thanh
dong trong » duong trong, dung trong, cong trong
tang chua » tang cua, tranh chua, tang ha
trong san » trong cac, cong san, dong san
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: doc ((chieu xanh) or (vien nganh)) - hanh ((tang chua) or (trinh chuan)) dong trong san toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((chieu xanh) OR (vien nganh)) - hanh ((tang chua) OR (trinh chuan)) dong trong san toan ban.
• Adding a wildcard symbol may retrieve word variants: doc ((chieu xanh) or (vien nganh)) - hanh ((tang chua) or (trinh chuan)) dong trong san toan ban*.