Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hanh trinh » canh tranh, hanh chinh
dang hoang » quang hoang, dang cong, dang hung
trinh han » trinh quan
dang hang » dang hung, dang hanh, hang hang
ho chieu » theo chieu, hoc thieu, doi chieu
toan tap » toan ban
va toan » van toan, bai toan, tap toan

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 sach - hanh trinh han ((dang hang) OR (dang hoang)) va toan tap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu sach - hanh trinh han ((dang hang) OR (dang hoang)) va toan tap".
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - hanh trinh han ((dang hang) OR (dang hoang)) va toan tap*.