Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
chieu sang » chieu sach, chieu xanh, hieu lang
hanh tang » hanh trang, anh tang, hanh mang
cua thong » cua thuong, cua khong, cua tong
thong tap » thong cap, thong tai, thong lap
tang cua » mang cua, hang cua, tang luan
tong tap » tuong tac, trong tan, cong tac
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 sang)) - hanh tang cua thong ((thong tap) OR (tong tap)) toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu xanh) OR (chieu sang)) - hanh tang cua thong ((thong tap) OR (tong tap)) toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu xanh) or (chieu sang)) - hanh tang cua thong ((thong tap) OR (tong tap)) toan ban".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu xanh) or (chieu sang)) - hanh tang cua thong ((thong tap) OR (tong tap)) toan ban*.