Perhaps you should try some spelling variations:
trinh thuat » trinh luat, trinh thiet, trinh thuc
dinh thiet » trinh thiet, dinh viet, dinh tieu
hien tach » thien hach, chiet tach, vien bach
hang cong » dang cong, hang nong, bang cong
dinh thi » dinh tri
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 hien tach - hanh ((((trinh thuat) or (dinh thiet))) or (dinh thi)) hang cong dan toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien tach - hanh ((((trinh thuat) OR (dinh thiet))) OR (dinh thi)) hang cong dan toan tap.
• Adding a wildcard symbol may retrieve word variants: hoc hien tach - hanh ((((trinh thuat) or (dinh thiet))) or (dinh thi)) hang cong dan toan tap*.