Perhaps you should try some spelling variations:
trinh thuat » trinh luat, trinh thiet, trinh thuc
chieu sang » chieu sach, chieu xanh, hieu lang
nhung cong » dung cong, thong cong, hang cong
hoc chieu » hoc thieu, ho chieu, hoc hien
trinh tai » trinh toan, trinh tu, trinh han
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 chieu sang - hanh ((trinh thuat) or (trinh tai)) nhung cong dan toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu sang - hanh ((trinh thuat) OR (trinh tai)) nhung cong dan toan tap.
• Adding a wildcard symbol may retrieve word variants: hoc chieu sang - hanh ((trinh thuat) or (trinh tai)) nhung cong dan toan tap*.