Perhaps you should try some spelling variations:
phuong cong » phuong dong, phong cong, phung cong
cac phuong » cac truong
chieu sang » chieu sach, chieu xanh, hieu lang
hoc chieu » hoc thieu, ho chieu, hoc hien
cong manh » cong danh, duong manh, cong thanh
hanh han » hanh nhan, hanh phan, anh han
hanh san » thanh san, khach san, thanh son
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: hoc chieu sang - ((hanh han) or (hanh san)) cac phuong cong manh ((toan cao) or (van ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu sang - ((hanh han) OR (hanh san)) cac phuong cong manh ((toan cao) OR (van ban)).
• Adding a wildcard symbol may retrieve word variants: hoc chieu sang - ((hanh han) or (hanh san)) cac phuong cong manh ((toan cao) or (van ban))*.