Perhaps you should try some spelling variations:
thieu tinh » chieu tinh, thien tinh, lieu tinh
tuong manh » luong manh, tung manh, tuong lanh
duong manh » duong van
hanh tang » hanh trang, anh tang, hanh mang
cua nhung » va nhung
tang cua » mang cua, hang cua, tang luan
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 tinh) or (trieu tinh)) - hanh tang cua nhung ((tuong manh) OR (duong manh)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu tinh) OR (trieu tinh)) - hanh tang cua nhung ((tuong manh) OR (duong manh)) toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu tinh) or (trieu tinh)) - hanh tang cua nhung ((tuong manh) OR (duong manh)) toan cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu tinh) or (trieu tinh)) - hanh tang cua nhung ((tuong manh) OR (duong manh)) toan cau*.