Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
trinh quan » tinh quang, trinh luat, trinh han
nhung cong » dung cong, thong cong, hang cong
trinh cua » tinh cua, trinh luat, trinh luan
cong van » cong vang, cong san, song van
van quan » van ban
quan cua » quan luan, ban cua, gian cua
chu van » cuu van, chu han

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chu van) or (chieu sach)) - hanh ((trinh cua) OR (trinh quan)) nhung cong van quan cua~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chu van) OR (chieu sach)) - hanh ((trinh cua) OR (trinh quan)) nhung cong van quan cua.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chu van) or (chieu sach)) - hanh ((trinh cua) OR (trinh quan)) nhung cong van quan cua".
• Adding a wildcard symbol may retrieve word variants: theo ((chu van) or (chieu sach)) - hanh ((trinh cua) OR (trinh quan)) nhung cong van quan cua*.