Perhaps you should try some spelling variations:
trinh thuat » trinh luat, trinh thiet, trinh chat
chieu sach » chinh sach, chiet tach, chieu sang
trinh thuc » trinh thi
nhung cong » dung cong, thong cong, hang cong
ho chieu » theo chieu, hoc thieu, doi chieu
trinh tu » trinh ky, trinh do
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
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: ho chieu sach - hanh ((trinh thuat) or (((trinh thuc) OR (trinh tu)))) nhung cong dan toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sach - hanh ((trinh thuat) OR (((trinh thuc) OR (trinh tu)))) nhung cong dan toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu sach - hanh ((trinh thuat) or (((trinh thuc) OR (trinh tu)))) nhung cong dan toan tap".
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - hanh ((trinh thuat) or (((trinh thuc) OR (trinh tu)))) nhung cong dan toan tap*.