Perhaps you should try some spelling variations:
thiet hach » thien hach, thuyet hach, thiet hai
hanh tranh » canh tranh, hanh trinh, hanh trang
nhung cong » dung cong, thong cong, hang cong
hoc thiet » hoc thieu, hoc thuyet, hoc hien
tranh van » tran van, trinh van, thanh van
van nhung » van nhuong, va nhung, van hung
ban thanh » ban hanh, ban hang
ban than » van thanh, ban hang, ban hanh

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 hach - hanh tranh van nhung cong ((ban than) or (ban thanh)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thiet hach - hanh tranh van nhung cong ((ban than) OR (ban thanh)) cau.
• Adding a wildcard symbol may retrieve word variants: hoc thiet hach - hanh tranh van nhung cong ((ban than) or (ban thanh)) cau*.