Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
bien tinh » bi tinh, yen tinh, diep tinh
tranh cua » doanh cua
hoc bien » hoc hien, hoc vien, hoa bien
manh cua » doanh cua, ban cua
cong san » cong tac
toan tai » toan tap, doanh tai, toan 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 bien tinh - canh ((tranh cua) or (manh cua)) thong cong san ((toan tai) or (van ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc bien tinh - canh ((tranh cua) OR (manh cua)) thong cong san ((toan tai) OR (van ban)).
• Adding a wildcard symbol may retrieve word variants: hoc bien tinh - canh ((tranh cua) or (manh cua)) thong cong san ((toan tai) or (van ban))*.