Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
hanh tang » hanh trang, anh tang, hanh tung
hanh mang » nhanh mang, hanh trang, nhanh lang
dung cong » dung trong
cua dung » cua dang, cua dong, qua dung
cong san » cong tac
san van » tan van, luan van, tran van

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((theo chieu) or (hoc hien)) tinh - ((hanh tang) or (hanh mang)) cua dung cong san van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo chieu) OR (hoc hien)) tinh - ((hanh tang) OR (hanh mang)) cua dung cong san van ban.
• Adding a wildcard symbol may retrieve word variants: ((theo chieu) or (hoc hien)) tinh - ((hanh tang) or (hanh mang)) cua dung cong san van ban*.