Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
thong cong » trong cong, tong cong, thong thong
tang luan » dung luan
tang cua » mang cua, hang cua, thong cua
cong tam » cong tac, cong tan, cong nam
tam khan » tam than, tam chan, tham khao
khan cap » khan ap, than cap, khoan cam

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo chieu sach - hanh ((tang cua) OR (tang luan)) thong cong tam khan cap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chieu sach - hanh ((tang cua) OR (tang luan)) thong cong tam khan cap".
• Adding a wildcard symbol may retrieve word variants: theo chieu sach - hanh ((tang cua) OR (tang luan)) thong cong tam khan cap*.