Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
tranh cua » doanh cua, manh cua
hang cong » dang cong, hang nong, bang cong
dan phan » doan phan, dan chan, van phan
phan cac » nhan cach, phan dau, phan lap
hoc hai » hoc dai, hoc bai, hoc tai
hoc ha » hoc hoa, hoc hat, hoc ma

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc ha) or (hoc hai)) tinh - canh tranh cua ((thong cong) or (hang cong)) dan phan cac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc ha) OR (hoc hai)) tinh - canh tranh cua ((thong cong) OR (hang cong)) dan phan cac.
• Adding a wildcard symbol may retrieve word variants: ((hoc ha) or (hoc hai)) tinh - canh tranh cua ((thong cong) or (hang cong)) dan phan cac*.