Perhaps you should try some spelling variations:
khung hoang » phuong hoang
chieu sach » chinh sach, chiet tach, chieu sang
thong cong » trong cong, tong cong, thong thong
ho chieu » theo chieu, hoc thieu, doi chieu
trang va » hang va
tran van » luan van
van tan » van tuan, van ban, van tai
tan cao » toan cao, tao cao, tay cao

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 - hanh ((trang va) or (tran van)) ((thong cong) or (khung hoang)) van tan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sach - hanh ((trang va) OR (tran van)) ((thong cong) OR (khung hoang)) van tan cao.
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - hanh ((trang va) or (tran van)) ((thong cong) or (khung hoang)) van tan cao*.