Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu tinh » lieu tinh, chau tinh, kieu tinh
trung phap » trung phan, trong phap, trung phat
phap thong » phap phong, phap chong, pho thong
thong cong » trong cong, tong cong, thong thong
cong san » cong tac
pham dau » phan dau, pham dac, phap dau
pham dat » pham dac, pham nhat, pham dang

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((chieu tinh) OR (trieu tinh)) - thanh trung phap thong cong san ((pham dau) or (pham dat))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu tinh) OR (trieu tinh)) - thanh trung phap thong cong san ((pham dau) OR (pham dat)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu tinh) OR (trieu tinh)) - thanh trung phap thong cong san ((pham dau) or (pham dat))".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu tinh) OR (trieu tinh)) - thanh trung phap thong cong san ((pham dau) or (pham dat))*.