Perhaps you should try some spelling variations:
truong trung » tieng trung
phuong thao » phuong phap, phuong thuc
chieu tinh » trieu tinh, lieu tinh, kieu tinh
hanh thang » nhanh thang, thanh thang, hanh trang
chau tinh » cuu tinh, ha tinh, cua tinh
thang va » hang va, trang va, thong va
toan cau » toan cao, toan ban, toan tap
va dung » van dung, va duong, vat dung

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((chieu tinh) OR (chau tinh)) - hanh thang va dung ((truong trung) or (phuong thao)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu tinh) OR (chau tinh)) - hanh thang va dung ((truong trung) OR (phuong thao)) toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu tinh) OR (chau tinh)) - hanh thang va dung ((truong trung) or (phuong thao)) toan cau".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu tinh) OR (chau tinh)) - hanh thang va dung ((truong trung) or (phuong thao)) toan cau*.