Perhaps you should try some spelling variations:
va phuong » va thuong, cac phuong
thong tac » thong cac, tuong tac, thong tai
cua tinh » cua sinh, va tinh, ha tinh
hanh san » thanh san, khach san, thanh son
va thong » va thuong, he thong, va cong
tac toan » tap toan, tam toan, hach toan
toan ban » van ban
doc cua » hoc cua, doi cua, do cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc cua tinh - hanh san ((va thong) OR (va phuong)) thong tac toan ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc cua tinh - hanh san ((va thong) OR (va phuong)) thong tac toan ban".
• Adding a wildcard symbol may retrieve word variants: doc cua tinh - hanh san ((va thong) OR (va phuong)) thong tac toan ban*.