Perhaps you should try some spelling variations:
chung thong » thong thong, hung thang, cong thong
chieu sang » chieu sach, chieu xanh, hieu lang
trinh toan » tinh toan, thanh toan, trinh quan
thong tinh » thuong tinh, thong tin, thong minh
trinh han » trinh quan
ho chieu » theo chieu, hoc thieu, mot chieu
toan cau » toan cao, toan tap, toan tai
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: ho chieu sang - hanh ((trinh toan) or (trinh han)) chung thong tinh ((toan cau) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sang - hanh ((trinh toan) OR (trinh han)) chung thong tinh ((toan cau) OR (toan ban)).
• Adding a wildcard symbol may retrieve word variants: ho chieu sang - hanh ((trinh toan) or (trinh han)) chung thong tinh ((toan cau) or (toan ban))*.