Perhaps you should try some spelling variations:
thieu tinh » trieu tinh, chieu tinh, lieu tinh
thien tinh » khien tinh, thien minh, tien tinh
nhung cong » dung cong, thong cong, hang cong
trang cua » tang cua, trung cua, thang cua
tranh cua » doanh cua, manh cua
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
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 (thien tinh)) - hanh ((trang cua) OR (tranh cua)) nhung cong dan toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu tinh) OR (thien tinh)) - hanh ((trang cua) OR (tranh cua)) nhung cong dan toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu tinh) or (thien tinh)) - hanh ((trang cua) OR (tranh cua)) nhung cong dan toan cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu tinh) or (thien tinh)) - hanh ((trang cua) OR (tranh cua)) nhung cong dan toan cau*.