Perhaps you should try some spelling variations:
trinh thuat » trinh luat, trinh thiet, trinh thuc
thieu tach » thien hach, chiet tach, chieu sach
hang huong » hang thuong, hang luong, hoang phuong
hoc thieu » toc thieu, hoc hien
trinh tu » trinh ky, trinh do
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 - hanh ((trinh thuat) or (trinh tu)) hang huong dan toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu tach - hanh ((trinh thuat) OR (trinh tu)) hang huong dan toan tap.
• Adding a wildcard symbol may retrieve word variants: hoc thieu tach - hanh ((trinh thuat) or (trinh tu)) hang huong dan toan tap*.