Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
lieu tinh » trieu tinh, diep tinh, bien tinh
canh manh » lanh manh, canh tranh, cach mang
cua thong » cua thuong, cua khong, cua tong
thong dan » thong van, tuong dan, trong dan
thong den » thong dien, tuong den, thong dieu
manh cua » doanh cua, ban cua
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: hoc ((thieu xanh) or (lieu tinh)) - canh manh cua thong ((thong dan) OR (thong den)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu xanh) OR (lieu tinh)) - canh manh cua thong ((thong dan) OR (thong den)) toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu xanh) or (lieu tinh)) - canh manh cua thong ((thong dan) OR (thong den)) toan cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu xanh) or (lieu tinh)) - canh manh cua thong ((thong dan) OR (thong den)) toan cau*.