Perhaps you should try some spelling variations:
trung cong » truong cong, trong cong, trung uong
thi khong » thi hong, thi phuong, khoi khong
tranh cua » doanh cua, manh cua
cua trung » cua truong, xuan trung, cua nhung
cong van » cong vang, cong san, song van
khang va » hang va, thang va, khang vi
hoc thi » hoc thai, hoc tai, hoc chi
khang a » chang ha, khan gia, khang cu

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thi khong - canh tranh cua trung cong van ((khang va) or (khang a))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thi khong - canh tranh cua trung cong van ((khang va) OR (khang a)).
• Adding a wildcard symbol may retrieve word variants: hoc thi khong - canh tranh cua trung cong van ((khang va) or (khang a))*.