Perhaps you should try some spelling variations:
truong cong » trong cong, truong dong, truong long
thiet tach » chiet tach, thien hach
thuat tach » thuat sach, thuat mach, thuat tac
cua truong » cua trung, xuan truong, cac truong
tranh cua » doanh cua, manh cua
than phan » thanh phan, thanh pham, thanh nhan
toan phan » thanh phan, toan ban, hoa phan

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((thiet tach) OR (thuat tach)) - canh tranh cua truong cong ((than phan) or (toan phan)) dau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thiet tach) OR (thuat tach)) - canh tranh cua truong cong ((than phan) OR (toan phan)) dau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thiet tach) OR (thuat tach)) - canh tranh cua truong cong ((than phan) or (toan phan)) dau".
• Adding a wildcard symbol may retrieve word variants: hoc ((thiet tach) OR (thuat tach)) - canh tranh cua truong cong ((than phan) or (toan phan)) dau*.