Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
thieu tinh » chieu tinh, thien tinh, lieu tinh
cong nganh » cong ngang, trong nganh, duong nganh
nganh toan » nganh thanh, thanh toan, manh toan
tranh cua » doanh cua
manh cua » doanh cua, ban cua
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 ((thieu tinh) OR (trieu tinh)) - canh ((tranh cua) or (manh cua)) nhung cong nganh toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu tinh) OR (trieu tinh)) - canh ((tranh cua) OR (manh cua)) nhung cong nganh toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu tinh) OR (trieu tinh)) - canh ((tranh cua) or (manh cua)) nhung cong nganh toan ban".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu tinh) OR (trieu tinh)) - canh ((tranh cua) or (manh cua)) nhung cong nganh toan ban*.