Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
hanh tranh » canh tranh, hanh trinh, hanh trang
nhung cong » dung cong, thong cong, hang cong
doi chieu » doc hieu, doi chi, ho chieu
tranh cua » doanh cua, manh cua
cua nhung » va nhung
cong dan » cong san, cong tan, huong dan
gian nan » gian dan, gian lan, giai nan
gian van » giang van, gian dan, gian lan

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((doi chieu) or (theo chieu)) sach - hanh tranh cua nhung cong dan ((gian nan) OR (gian van))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chieu) OR (theo chieu)) sach - hanh tranh cua nhung cong dan ((gian nan) OR (gian van)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doi chieu) or (theo chieu)) sach - hanh tranh cua nhung cong dan ((gian nan) OR (gian van))".
• Adding a wildcard symbol may retrieve word variants: ((doi chieu) or (theo chieu)) sach - hanh tranh cua nhung cong dan ((gian nan) OR (gian van))*.