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
hoc hoai » hoc hai, hoc hoi, hoc ngoai
dan phan » doan phan, dan chan, van phan
phan cac » nhan cach, phan dau, phan lap
hoc hoa » hoc khoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc hoa) or (hoc hoai)) 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 hoa) OR (hoc hoai)) tinh - canh tranh cua ((thong cong) OR (hang cong)) dan phan cac.
• Adding a wildcard symbol may retrieve word variants: ((hoc hoa) or (hoc hoai)) tinh - canh tranh cua ((thong cong) or (hang cong)) dan phan cac*.