Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
hanh trinh » canh tranh, hanh chinh
doi chieu » doc hieu, doi chi, mot chieu
vat trong » viet trong, dot trong, cay trong
vat tong » va tong, vat dong, dat trong
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
toan cau » 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: doi chieu sang - hanh trinh ((vat tong) OR (vat trong)) cong tac toan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu sang - hanh trinh ((vat tong) OR (vat trong)) cong tac toan cau*".