Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
canh trinh » canh tranh, hanh trinh, canh tinh
hien hanh » dieu hanh
va tuong » va thuong, va thong, xa truong
cong van » cong vang, cong san, song van
van quan » van ban
va tong » va thong, va trong, va cong
quan ha » quan he

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((chieu xanh) or (hien hanh)) - canh trinh ((va tong) OR (va tuong)) cong van quan ha~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu xanh) OR (hien hanh)) - canh trinh ((va tong) OR (va tuong)) cong van quan ha.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu xanh) or (hien hanh)) - canh trinh ((va tong) OR (va tuong)) cong van quan ha".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu xanh) or (hien hanh)) - canh trinh ((va tong) OR (va tuong)) cong van quan ha*.