Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
thong cong » trong cong, tong cong, thong thong
trung cam » trung tam, trung cap, trung ca
trung nam » trung tam, trong nam, trung cap
ho chieu » theo chieu, hoc thieu, doi chieu
cong tan » cong tac, cong san, cong thanh
tan than » tan thanh, tan tran, ban than
than tap » toan tap, han tap, phan tap

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 ((trung cam) OR (trung nam)) thong cong tan than tap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu sach - hanh ((trung cam) OR (trung nam)) thong cong tan than tap".
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - hanh ((trung cam) OR (trung nam)) thong cong tan than tap*.