Perhaps you should try some spelling variations:
thieu xanh » hieu manh, thien anh, thien danh
chieu xanh » chieu sach, chieu tinh, hieu manh
chieu sang » chieu sach, hieu lang, nhieu tang
hanh trinh » canh tranh, hanh chinh
nhung cong » dung cong, thong cong, hang cong
cong manh » cong danh, duong manh, cong thanh
manh toan » thanh toan, anh tuan, tinh toan
trinh va » trinh van, trinh vat, trinh ve
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((thieu xanh) or (((chieu xanh) OR (chieu sang)))) - hanh trinh va nhung cong manh toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu xanh) OR (((chieu xanh) OR (chieu sang)))) - hanh trinh va nhung cong manh toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu xanh) or (((chieu xanh) OR (chieu sang)))) - hanh trinh va nhung cong manh toan ban".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu xanh) or (((chieu xanh) OR (chieu sang)))) - hanh trinh va nhung cong manh toan ban*.