Perhaps you should try some spelling variations:
trinh quan » tinh quang, trinh luat, trinh han
hanh trinh » canh tranh, hanh chinh
hoc chinh » hoan chinh, hoc sinh, hoc kinh
ho chinh » cho chinh, hoa chinh, do chinh
quan han » quan hanh, quanh han, quan ha
tong dan » tuong dan, thong dan, trong dan
toan cau » toan cao, toan ban, toan tai
toan tap » toan ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((ho chinh) OR (hoc chinh)) sach - hanh trinh quan han tong dan ((toan cau) or (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chinh) OR (hoc chinh)) sach - hanh trinh quan han tong dan ((toan cau) OR (toan tap)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chinh) OR (hoc chinh)) sach - hanh trinh quan han tong dan ((toan cau) or (toan tap))".
• Adding a wildcard symbol may retrieve word variants: ((ho chinh) OR (hoc chinh)) sach - hanh trinh quan han tong dan ((toan cau) or (toan tap))*.