Perhaps you should try some spelling variations:
chiet tach » chieu sach
hanh trinh » canh tranh, hanh chinh
nhung cong » dung cong, nhung don, nhung lang
thong cong » trong cong, tong cong, thong thong
hoc chiet » hoc thiet, hoc nhiet, hoc hien
trinh cua » tinh cua, trinh luat, trinh quan
hang cong » dang cong, hang nong, bang cong
van toan » van tuan, van tan, van thanh
toan ban » van ban

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 ((((nhung cong) OR (hang cong))) or (thong cong)) van toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chiet tach - hanh trinh cua ((((nhung cong) OR (hang cong))) OR (thong cong)) van toan ban*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc chiet tach - hanh trinh cua ((((nhung cong) OR (hang cong))) or (thong cong)) van toan ban*".