Perhaps you should try some spelling variations:
pham truong » pham thuong, pham trong, pham trung
cam truong » cac truong, lam truong, cao truong
lieu tinh » trieu tinh, diep tinh, bien tinh
doc lieu » duoc lieu, doc hieu, du lieu
cong dan » cong san, cong tan, huong dan
chan cau » can cau, chinh cau, nhanh cau
phan cau » phan dau, phan cac, phan tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc lieu tinh - canh tranh ((cam truong) or (pham truong)) cong dan ((chan cau) OR (phan cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc lieu tinh - canh tranh ((cam truong) OR (pham truong)) cong dan ((chan cau) OR (phan cau)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc lieu tinh - canh tranh ((cam truong) or (pham truong)) cong dan ((chan cau) OR (phan cau))".
• Adding a wildcard symbol may retrieve word variants: doc lieu tinh - canh tranh ((cam truong) or (pham truong)) cong dan ((chan cau) OR (phan cau))*.