Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
trinh luan » trinh luat, trinh quan, trinh han
hoc thieu » toc thieu, hoc hien
cong vang » cong lang, cong quang, cong ngang
ho chieu » theo chieu, mot chieu, doi chieu
cong van » cong san, song van, cong tan
tuan thu » toan thuc, van thu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((ho chieu) OR (hoc thieu)) sach - hanh trinh luan chi ((cong van) or (cong vang)) tuan thu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (hoc thieu)) sach - hanh trinh luan chi ((cong van) OR (cong vang)) tuan thu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) OR (hoc thieu)) sach - hanh trinh luan chi ((cong van) or (cong vang)) tuan thu".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) OR (hoc thieu)) sach - hanh trinh luan chi ((cong van) or (cong vang)) tuan thu*.