Perhaps you should try some spelling variations:
cong ngang » cong nhan, cong quang, cong lang
hien hanh » dieu hanh
hanh sinh » hanh tinh, hanh dinh, hinh sinh
cua nhung » va nhung
sinh cua » manh cua, dinh cuu, sinh va
cong tac » cong ty
tuan cao » toan cao, juan cao, quang cao

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 - hanh sinh cua nhung ((cong tac) or (cong ngang)) tuan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien hanh - hanh sinh cua nhung ((cong tac) OR (cong ngang)) tuan cao.
• Adding a wildcard symbol may retrieve word variants: hoc hien hanh - hanh sinh cua nhung ((cong tac) or (cong ngang)) tuan cao*.