Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hanh trang » thanh trung, canh tranh, hanh trinh
thanh tung » thanh cong
thong dung » thong cong, thong thuong
dung manh » duong manh, dung danh, hung manh
ho chieu » theo chieu, hoc thieu, doi chieu
va thong » va thuong, va phuong, he thong
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 chieu sach - ((hanh trang) or (thanh tung)) va thong dung manh ((toan cau) OR (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sach - ((hanh trang) OR (thanh tung)) va thong dung manh ((toan cau) OR (toan tap)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu sach - ((hanh trang) or (thanh tung)) va thong dung manh ((toan cau) OR (toan tap))".
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - ((hanh trang) or (thanh tung)) va thong dung manh ((toan cau) OR (toan tap))*.