Perhaps you should try some spelling variations:
lang thanh » dang thanh, tang thanh, lang thang
chieu sach » chinh sach, chiet tach, chieu sang
sach nang » cach mang, sach dung, sach danh
nang thuc » dang thuoc, nhanh thuc, trang thuc
thuc dong » thuoc dong, thuc dung, phuc dong
dong cong » duong cong, dung cong, dang cong
dang toan » dang tran, dan toan, dung toan
ho chieu » theo chieu, hoc thieu, mot chieu

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 - sach nang thuc dong cong ((lang thanh) or (dang toan)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sach - sach nang thuc dong cong ((lang thanh) OR (dang toan)) cao*.