Perhaps you should try some spelling variations:
trung cong » truong cong, trong cong, trung uong
hoc thieu » hoc hien
tranh cua » doanh cua, manh cua
cua trung » cua truong, xuan trung, cua nhung
san khang » van khang, san chang, san khong
cong san » cong tac
khang va » hang va, thang va, khang a

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc thieu) OR (toc thieu)) khang - canh tranh cua trung cong san khang va~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc thieu) OR (toc thieu)) khang - canh tranh cua trung cong san khang va".
• Adding a wildcard symbol may retrieve word variants: ((hoc thieu) OR (toc thieu)) khang - canh tranh cua trung cong san khang va*.