Perhaps you should try some spelling variations:
thanh tung » thanh cong
hoa thiet » hoc thiet, toan thiet, hoa viet
va phuong » va thuong, cac phuong
ho thiet » hoc thiet, so thiet, hoc thieu
va thong » va thuong, he thong, va cong
cong van » cong vang, cong san, song van
van quan » van ban
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: ((hoa thiet) or (ho thiet)) tach - thanh tung ((va thong) OR (va phuong)) cong van quan ha~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoa thiet) OR (ho thiet)) tach - thanh tung ((va thong) OR (va phuong)) cong van quan ha.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoa thiet) or (ho thiet)) tach - thanh tung ((va thong) OR (va phuong)) cong van quan ha".
• Adding a wildcard symbol may retrieve word variants: ((hoa thiet) or (ho thiet)) tach - thanh tung ((va thong) OR (va phuong)) cong van quan ha*.