Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
thong cong » trong cong, tong cong, thong thong
hoc chieu » hoc thieu, ho chieu, hoc hien
trinh cua » tinh cua, trinh quan, trinh luan
dung cong » dung trong
dan chan » dan gian, dan ca, van chat
chan tu » phan tu, han tu, chon tu

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 - hanh ((trinh cua) OR (trinh luat)) ((thong cong) or (dung cong)) dan chan tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu sach - hanh ((trinh cua) OR (trinh luat)) ((thong cong) OR (dung cong)) dan chan tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc chieu sach - hanh ((trinh cua) OR (trinh luat)) ((thong cong) or (dung cong)) dan chan tu".
• Adding a wildcard symbol may retrieve word variants: hoc chieu sach - hanh ((trinh cua) OR (trinh luat)) ((thong cong) or (dung cong)) dan chan tu*.