Perhaps you should try some spelling variations:
theo chieu » theo tieu, theo chu, thi chieu
thong cong » trong cong, tong cong, phong chong
hanh tran » hanh trang, thanh tran, hanh tram
ho chieu » hoc thieu, doi chieu, mot chieu
tran van » luan van
dan toan » van toan, dan than, manh toan
toan cao » toan ban, toan tap

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) OR (theo chieu)) sach - hanh tran van ((thong cong) or (thong thong)) dan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (theo chieu)) sach - hanh tran van ((thong cong) OR (thong thong)) dan toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) OR (theo chieu)) sach - hanh tran van ((thong cong) or (thong thong)) dan toan cao".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) OR (theo chieu)) sach - hanh tran van ((thong cong) or (thong thong)) dan toan cao*.