Perhaps you should try some spelling variations:
lieu tinh » trieu tinh, diep tinh, bien tinh
nhan dinh » nhan sinh, phan dinh, nhan tinh
cuu thong » cuu thuong, cuu tong, cuu chong
thong tan » thong than, thong tran, thong tin
yen tinh » tuyen tinh
dinh cuu » dinh chi
toan cau » toan cao, toan ban, toan tai
toan tap » toan ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi ((lieu tinh) or (yen tinh)) - nhan dinh cuu thong thong tan ((toan cau) or (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((lieu tinh) OR (yen tinh)) - nhan dinh cuu thong thong tan ((toan cau) OR (toan tap)).
• Adding a wildcard symbol may retrieve word variants: doi ((lieu tinh) or (yen tinh)) - nhan dinh cuu thong thong tan ((toan cau) or (toan tap))*.