Perhaps you should try some spelling variations:
phuong cong » phuong dong, phong cong, phung cong
chieu sang » chieu sach, chieu xanh, hieu lang
trinh cua » trinh luat, trinh quan, trinh luan
ho chieu » theo chieu, hoc thieu, doi chieu
tinh cua » tinh chat, tranh cua, tinh thua
sinh cua » manh cua, dinh cuu, sinh va
cong tan » cong tac, cong san, cong thanh
tan toan » tan tran, tap toan, van toan
toan cao » toan ban, toan tap

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 cua) or (((tinh cua) OR (sinh cua)))) phuong cong tan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sang - hanh ((trinh cua) OR (((tinh cua) OR (sinh cua)))) phuong cong tan toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu sang - hanh ((trinh cua) or (((tinh cua) OR (sinh cua)))) phuong cong tan toan cao".
• Adding a wildcard symbol may retrieve word variants: ho chieu sang - hanh ((trinh cua) or (((tinh cua) OR (sinh cua)))) phuong cong tan toan cao*.