Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, thi chieu
thong cong » trong cong, tong cong, thong thong
tang luan » dung luan
theo chu » cho chu, chao chu, theo yeu
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) OR (theo chu)) sach - hanh ((tang cua) or (tang luan)) thong cong tam khan cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo chieu) OR (theo chu)) 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) OR (theo chu)) sach - hanh ((tang cua) or (tang luan)) thong cong tam khan cap".
• Adding a wildcard symbol may retrieve word variants: ((theo chieu) OR (theo chu)) sach - hanh ((tang cua) or (tang luan)) thong cong tam khan cap*.