Perhaps you should try some spelling variations:
thuong cong » thong cong, thuong con, truong cong
thuong dong » phuong dong, tuong dong, chuong dong
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
mang cua » dung cua, ban cua, cong cua
manh cua » doanh cua, ban cua
toan tap » toan ban

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 ((mang cua) or (manh cua)) ((thuong cong) OR (thuong dong)) tinh toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu sach - hanh ((mang cua) OR (manh cua)) ((thuong cong) OR (thuong dong)) tinh toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chieu sach - hanh ((mang cua) or (manh cua)) ((thuong cong) OR (thuong dong)) tinh toan tap".
• Adding a wildcard symbol may retrieve word variants: theo chieu sach - hanh ((mang cua) or (manh cua)) ((thuong cong) OR (thuong dong)) tinh toan tap*.