Perhaps you should try some spelling variations:
thiet tach » thien hach, thuat tach
chiet tach » chieu sach
hanh trinh » canh tranh, hanh chinh
dong thanh » truong thanh
trinh cua » tinh cua, trinh luat, trinh quan
bang dong » bang song, bang cong, lang dong
cua bang » chua bang, cua ban, cua dang
toan cau » toan cao, toan tap, toan tai
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: soc ((thiet tach) or (chiet tach)) - hanh trinh cua bang dong thanh ((toan cau) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: soc ((thiet tach) OR (chiet tach)) - hanh trinh cua bang dong thanh ((toan cau) OR (toan ban)).
• Adding a wildcard symbol may retrieve word variants: soc ((thiet tach) or (chiet tach)) - hanh trinh cua bang dong thanh ((toan cau) or (toan ban))*.