Perhaps you should try some spelling variations:
nhiet nang » viet nang, nhieu tang, thien nang
thong cong » trong cong, tong cong, thong thong
tranh cua » doanh cua
manh cua » doanh cua, ban cua
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
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: hoc ((nhiet nang) OR (nhiet dong)) - hanh ((tranh cua) or (manh cua)) thong cong tac toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((nhiet nang) OR (nhiet dong)) - hanh ((tranh cua) OR (manh cua)) thong cong tac toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((nhiet nang) OR (nhiet dong)) - hanh ((tranh cua) or (manh cua)) thong cong tac toan ban".
• Adding a wildcard symbol may retrieve word variants: hoc ((nhiet nang) OR (nhiet dong)) - hanh ((tranh cua) or (manh cua)) thong cong tac toan ban*.