Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
cua thong » cua thuong, cua tong, suat thong
cua khong » hua khong, cua phuong, cua thuong
thong tap » thong cap, tong tap, thong tai
doc hieu » toc thieu, hoc thieu, hoc hien
ho chieu » theo chieu, hoc thieu, doi chieu
tap toan » tap doan, tap quan, bai toan
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((doc hieu) or (ho chieu)) sach - hanh trinh ((cua thong) OR (cua khong)) thong tap toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc hieu) OR (ho chieu)) sach - hanh trinh ((cua thong) OR (cua khong)) thong tap toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doc hieu) or (ho chieu)) sach - hanh trinh ((cua thong) OR (cua khong)) thong tap toan ban".
• Adding a wildcard symbol may retrieve word variants: ((doc hieu) or (ho chieu)) sach - hanh trinh ((cua thong) OR (cua khong)) thong tap toan ban*.