Perhaps you should try some spelling variations:
trinh trong » trinh truong, tranh trong, trinh trung
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
trong cau » trong cac, trong ca, thong cau
tinh tan » tinh toan, tinh than, trinh tan
cua dong » chua dong, cua dang, cua nong

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 - tinh tan ((cua dong) OR (cua cong)) cong trinh trong cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chieu sach - tinh tan ((cua dong) OR (cua cong)) cong trinh trong cau".
• Adding a wildcard symbol may retrieve word variants: theo chieu sach - tinh tan ((cua dong) OR (cua cong)) cong trinh trong cau*.