Perhaps you should try some spelling variations:
thanh tuong » thanh thuong, thanh tung, thanh huong
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
tuong cua » truong cua, huong cua, thong cua
tong cong » trong cong, cong cong, dung cong
khoan cam » khoa cam, khoan va, thuan cam
cua tong » cua cong, cua dong, cua nong
cong tan » cong tac, cong san, cong thanh
khan cap » khan ap, than cap, phan cac
phan cam » phan cac, phan cau, phan cang

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 - thanh tuong cua tong cong tan ((khan cap) or (((khoan cam) OR (phan cam))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu sach - thanh tuong cua tong cong tan ((khan cap) OR (((khoan cam) OR (phan cam)))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chieu sach - thanh tuong cua tong cong tan ((khan cap) or (((khoan cam) OR (phan cam))))".
• Adding a wildcard symbol may retrieve word variants: theo chieu sach - thanh tuong cua tong cong tan ((khan cap) or (((khoan cam) OR (phan cam))))*.