Perhaps you should try some spelling variations:
chieu sang » chieu xanh, hieu lang, nhieu tang
chieu sach » chinh sach, chiet tach, chieu xanh
hanh trinh » canh tranh, hanh chinh
thong hung » thong huong, thong nhung, thuong hung
trinh vat » trinh van, trinh luat, sinh vat
vat thong » va thong, vat trong, mat thong
manh toan » thanh toan, tinh toan

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoi ((chieu sang) OR (chieu sach)) - hanh trinh vat thong hung ((manh toan) or (anh tuan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoi ((chieu sang) OR (chieu sach)) - hanh trinh vat thong hung ((manh toan) OR (anh tuan)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoi ((chieu sang) OR (chieu sach)) - hanh trinh vat thong hung ((manh toan) or (anh tuan)) cau".
• Adding a wildcard symbol may retrieve word variants: hoi ((chieu sang) OR (chieu sach)) - hanh trinh vat thong hung ((manh toan) or (anh tuan)) cau*.