Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
nhung cong » dung cong, thong cong, hang cong
hoc thieu » toc thieu, hoc hien
hanh tang » hanh trang, anh tang, hanh tung
hanh mang » nhanh mang, hanh trang, nhanh lang
cua nhung » va nhung
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 thieu)) tinh - ((hanh tang) OR (hanh mang)) cua nhung cong san van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo chieu) OR (hoc thieu)) tinh - ((hanh tang) OR (hanh mang)) cua nhung cong san van ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((theo chieu) or (hoc thieu)) tinh - ((hanh tang) OR (hanh mang)) cua nhung cong san van ban".
• Adding a wildcard symbol may retrieve word variants: ((theo chieu) or (hoc thieu)) tinh - ((hanh tang) OR (hanh mang)) cua nhung cong san van ban*.