Perhaps you should try some spelling variations:
thiet danh » thien danh, thien anh, thien dang
hoc thiet » hoc thieu, hoc thuyet, hoc hien
tranh cua » doanh cua, manh cua
cong cong » cong dong, trong cong, dang cong
dung cong » dung trong
ban tu » van tu
ba tu » ba thu, bac tu, bai tu

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 danh - canh tranh cua ((cong cong) or (dung cong)) dan ((ba tu) or (ban tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thiet danh - canh tranh cua ((cong cong) OR (dung cong)) dan ((ba tu) OR (ban tu)).
• Adding a wildcard symbol may retrieve word variants: hoc thiet danh - canh tranh cua ((cong cong) or (dung cong)) dan ((ba tu) or (ban tu))*.