Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hoc chinh » hoan chinh, hoc sinh, hoc kinh
tinh sinh » tinh ninh, tinh binh, tinh hinh
canh tinh » hanh tinh, manh tinh, canh tranh
vat nhung » va nhung, vap nhung, vai nhung
cong dan » cong san, cong tan, huong dan
cac cau » bac cau, ca cau, cac cam
cac mau » cam mau, sach mau

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc chinh sach - ((tinh sinh) or (canh tinh)) vat nhung cong dan ((cac cau) OR (cac mau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chinh sach - ((tinh sinh) OR (canh tinh)) vat nhung cong dan ((cac cau) OR (cac mau)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc chinh sach - ((tinh sinh) or (canh tinh)) vat nhung cong dan ((cac cau) OR (cac mau))".
• Adding a wildcard symbol may retrieve word variants: hoc chinh sach - ((tinh sinh) or (canh tinh)) vat nhung cong dan ((cac cau) OR (cac mau))*.