Perhaps you should try some spelling variations:
hang cong » dang cong, hang nong, bang cong
theo phap » thi phap
cong manh » cong danh, duong manh, cong thanh
theo kha » thao khoa, theo chu, thep nha
anh nang » ganh nang, anh bang, anh dang
nang dua » nang du, nang suat, nang quan
dua hang » cua hang, dua lang, mua hang
toan tai » toan tap, doanh tai, toan cao
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((theo kha) OR (theo phap)) nang - anh nang dua hang cong manh ((toan tai) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo kha) OR (theo phap)) nang - anh nang dua hang cong manh ((toan tai) OR (toan ban)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((theo kha) OR (theo phap)) nang - anh nang dua hang cong manh ((toan tai) or (toan ban))".
• Adding a wildcard symbol may retrieve word variants: ((theo kha) OR (theo phap)) nang - anh nang dua hang cong manh ((toan tai) or (toan ban))*.