Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
luat thong » luat thuong, xuat thong, luat trong
mot chieu » doi chieu
ho chieu » theo chieu, hoc thieu, doi chieu
cong tan » cong tac, cong san, cong thanh
tan toan » tan tran, tap toan, van toan
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 (mot chieu)) sach - hanh trinh ((luat thong) OR (suat thong)) cong tan toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (mot chieu)) sach - hanh trinh ((luat thong) OR (suat thong)) cong tan toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) or (mot chieu)) sach - hanh trinh ((luat thong) OR (suat thong)) cong tan toan cau".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (mot chieu)) sach - hanh trinh ((luat thong) OR (suat thong)) cong tan toan cau*.