Perhaps you should try some spelling variations:
phuong tinh » phuong trinh, phuong binh, khuong tinh
theo chieu » theo tieu, theo chu, thi chieu
hanh trinh » canh tranh, hanh chinh
cua phuong » cuu phuong, cuc phuong, luan phuong
ho chieu » hoc thieu, doi chieu, mot chieu
trinh su » trinh tu, trinh san, trinh cau
toan cau » toan cao, toan ban, toan tai
toan tap » toan ban
su cua » hu cua, tu cua, vu cua

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