Perhaps you should try some spelling variations:
phung cong » nhung cong, phong cong, nhung chong
chieu sang » chieu sach, chieu xanh, hieu lang
hanh phan » thanh phan, anh phan, hanh han
ho chieu » theo chieu, hoc thieu, mot chieu
va phung » va phuong, van phung, va nhung
cong san » cong tac
than tap » toan tap, han tap, phan tap
pham tai » pham thi, pham van
phan va » phan van, nhan va, han va

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 phan va phung cong san ((than tap) OR (pham tai))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu sang - hanh phan va phung cong san ((than tap) OR (pham tai))".
• Adding a wildcard symbol may retrieve word variants: ho chieu sang - hanh phan va phung cong san ((than tap) OR (pham tai))*.