Perhaps you should try some spelling variations:
lang thanh » tang thanh, lang thang, nang thanh
nhung cong » dung cong, thong cong, hang cong
dang thanh » dong thanh, dang hanh, hoang thanh
hien hanh » dieu hanh
tranh van » tran van, trinh van, thanh van
van nhung » van nhuong, va nhung, van hung

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hien hanh - canh tranh van nhung cong ((lang thanh) or (dang thanh)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien hanh - canh tranh van nhung cong ((lang thanh) OR (dang thanh)) cao.
• Adding a wildcard symbol may retrieve word variants: hoc hien hanh - canh tranh van nhung cong ((lang thanh) or (dang thanh)) cao*.