Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
hoc thiet » hoc thuyet, hoc hien, toc thieu
hoc thieu » toc thieu, hoc hien
tranh cua » manh cua
doanh cua » doanh luan
cong doan » cong dan, cong hoan, dong doanh
doan phan » doanh phan, toan phan, dan phan
phan cac » nhan cach, phan dau, phan lap

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc thiet) or (hoc thieu)) danh - canh ((tranh cua) OR (doanh cua)) thong cong doan phan cac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc thiet) OR (hoc thieu)) danh - canh ((tranh cua) OR (doanh cua)) thong cong doan phan cac.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc thiet) or (hoc thieu)) danh - canh ((tranh cua) OR (doanh cua)) thong cong doan phan cac".
• Adding a wildcard symbol may retrieve word variants: ((hoc thiet) or (hoc thieu)) danh - canh ((tranh cua) OR (doanh cua)) thong cong doan phan cac*.