Perhaps you should try some spelling variations:
trinh thuat » trinh luat, trinh thiet, trinh chat
thieu tach » chiet tach, chieu sach, hieu cach
thien hach » thien thanh, hien hanh
trinh thuc » trinh tu, trinh thi
nhung cong » dung cong, thong cong, hang cong
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: hoc ((thieu tach) OR (thien hach)) - hanh ((trinh thuat) or (trinh thuc)) nhung cong dan toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu tach) OR (thien hach)) - hanh ((trinh thuat) OR (trinh thuc)) nhung cong dan toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu tach) OR (thien hach)) - hanh ((trinh thuat) or (trinh thuc)) nhung cong dan toan tap".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu tach) OR (thien hach)) - hanh ((trinh thuat) or (trinh thuc)) nhung cong dan toan tap*.