Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
theo phap » thi phap
phap tinh » phap sinh, phap tieng, phap tang
hang cua » mang cua, hang ca, huong cua
nang dua » nang du, nang suat, nang quan
cong dan » cong san, cong tan, huong dan
than cao » thai cao, than cap, than sao
toan cao » toan ban, toan tap

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

• If you are trying to use Boolean operators, they must be ALL CAPS: theo phap tinh - anh ((hang cua) OR (nang dua)) nhung cong dan ((than cao) OR (toan cao))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo phap tinh - anh ((hang cua) or (nang dua)) nhung cong dan ((than cao) OR (toan cao))~".
• Adding a wildcard symbol may retrieve word variants: theo phap tinh - anh ((hang cua) or (nang dua)) nhung cong dan ((than cao) OR (toan cao))*.