Perhaps you should try some spelling variations:
chiet tach » chieu sach
hanh trinh » canh tranh, hanh chinh
thong cong » trong cong, tong cong, phong chong
hoc chiet » hoc thiet, hoc nhiet, hoc hien
trinh cua » tinh cua, trinh luat, trinh quan
bang cong » dang cong, bang song, hang cong
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: hoc chiet tach - hanh trinh cua ((((thong cong) or (thong thong))) or (bang cong)) dan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chiet tach - hanh trinh cua ((((thong cong) OR (thong thong))) OR (bang cong)) dan toan cao.
• Adding a wildcard symbol may retrieve word variants: hoc chiet tach - hanh trinh cua ((((thong cong) or (thong thong))) or (bang cong)) dan toan cao*.