Perhaps you should try some spelling variations:
trinh thuat » trinh luat, trinh thiet, trinh chat
thieu sang » chieu sang, thieu khang, thieu quang
trinh thuc » trinh tu, trinh thi
hoc thieu » toc thieu, hoc hien
hung cong » nhung cong, hung cuong, phung cong
cong tinh » cong trinh, cong vinh, long tinh
toan ban » van 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 sang - hanh ((trinh thuat) or (trinh thuc)) hung cong tinh toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sang - hanh ((trinh thuat) OR (trinh thuc)) hung cong tinh toan ban.
• Adding a wildcard symbol may retrieve word variants: hoc thieu sang - hanh ((trinh thuat) or (trinh thuc)) hung cong tinh toan ban*.