Perhaps you should try some spelling variations:
thuong dan » huong dan, thuong han, thuong dam
lieu tinh » trieu tinh, diep tinh, bien tinh
luan hang » luan nang, luan han, luan hung
anh dung » anh dong, anh huong, sach dung
phan cau » phan dau, phan cac, phan tu
toan cau » toan cao, toan ban, toan tap
co lieu » cot lieu, co hieu, so lieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: co lieu tinh - anh dung luan hang thuong dan ((phan cau) or (toan cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: co lieu tinh - anh dung luan hang thuong dan ((phan cau) OR (toan cau)).
• Adding a wildcard symbol may retrieve word variants: co lieu tinh - anh dung luan hang thuong dan ((phan cau) or (toan cau))*.