Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
chung nong » chung thong, chuong dong, nhung cong
hoc thieu » toc thieu, hoc hien
trinh han » trinh quan
hang nong » thang long, han tong
manh toan » thanh toan, anh tuan, tinh toan
ho chieu » theo chieu, mot chieu, doi chieu
toan cau » toan cao, toan ban, toan tap

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 han ((chung nong) or (hang nong)) manh toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (hoc thieu)) sach - hanh trinh han ((chung nong) OR (hang nong)) manh toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) OR (hoc thieu)) sach - hanh trinh han ((chung nong) or (hang nong)) manh toan cau".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) OR (hoc thieu)) sach - hanh trinh han ((chung nong) or (hang nong)) manh toan cau*.