Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
phan xuong » phan cong
dung thang » hung thang, cung thang, dung thuong
hoc chieu » hoc thieu, ho chieu, hoc hien
manh hung » anh huong
hung phan » huong phan, nhung phan, dung phan
dung dat » dung va, dung tai
phan lap » phan dau

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc chieu sach - manh hung phan xuong ((dung thang) OR (dung dat)) phan lap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc chieu sach - manh hung phan xuong ((dung thang) OR (dung dat)) phan lap".
• Adding a wildcard symbol may retrieve word variants: hoc chieu sach - manh hung phan xuong ((dung thang) OR (dung dat)) phan lap*.