Perhaps you should try some spelling variations:
thanh trong » thanh trung, tranh trong, hanh trong
chieu sach » chinh sach, chiet tach, chieu sang
nhung cong » dung cong, thong cong, hang cong
trong dam » trong lam, trong nam, trong cac
dam nhung » cam nhung, nam nhung, dam khung
ho chieu » theo chieu, hoc thieu, doi chieu
cong san » cong tac
khan cap » than cap, khoan cam, phan cac
khan ap » han ap, khan dam

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 - thanh trong dam nhung cong san ((tri cua) or (((khan cap) OR (khan ap))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sach - thanh trong dam nhung cong san ((tri cua) OR (((khan cap) OR (khan ap)))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu sach - thanh trong dam nhung cong san ((tri cua) or (((khan cap) OR (khan ap))))".
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - thanh trong dam nhung cong san ((tri cua) or (((khan cap) OR (khan ap))))*.