Perhaps you should try some spelling variations:
trung tuan » trung thanh, trung tam, tran tuan
chieu sach » chinh sach, chiet tach, chieu sang
cong vang » cong lang, cong quang, cong ngang
ho chieu » theo chieu, hoc thieu, doi chieu
manh cua » doanh cua, ban cua
cong van » cong san, song van, cong tan
tan cau » toan cau, van cau, tan ca

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 ((manh cua) or (trung tuan)) nhung ((cong van) OR (cong vang)) tan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sach - hanh ((manh cua) OR (trung tuan)) nhung ((cong van) OR (cong vang)) tan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu sach - hanh ((manh cua) or (trung tuan)) nhung ((cong van) OR (cong vang)) tan cau".
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - hanh ((manh cua) or (trung tuan)) nhung ((cong van) OR (cong vang)) tan cau*.