Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hoc chieu » hoc thieu, ho chieu, hoc hien
trinh cua » trinh luat, trinh quan, trinh luan
tong cong » trong cong, cong cong, dung cong
tinh cua » sinh cua, tinh chat, tranh cua
cong van » cong vang, cong san, song van
tuan tap » toan tap, tuyen tap, toan tai
tuan tai » toan tai, quan tai, tan tai

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