Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
thiet tach » chiet tach, thien hach, thuat tach
hoc thiet » hoc thieu, hoc thuyet, hoc hien
canh manh » lanh manh, canh tranh, cach mang
cua thong » cua thuong, cua khong, cua tong
manh cua » doanh cua, ban cua
tan toan » tan tran, tap toan, dan toan
van toan » van tuan, van tan, van thanh

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 - canh manh cua thong cong ((tan toan) OR (van toan)) ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thiet tach - canh manh cua thong cong ((tan toan) OR (van toan)) ban".
• Adding a wildcard symbol may retrieve word variants: hoc thiet tach - canh manh cua thong cong ((tan toan) OR (van toan)) ban*.