Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
hieu lang » chieu sang, hieu quang, nhieu tang
trinh cua » tinh cua, trinh luat, trinh quan
trinh han » trinh quan
cong hach » cong sach, cong thanh, cong khanh
hach toan » thanh toan, manh toan
hoi hieu » hoi phieu, hoi tieu, moi hieu
toan cao » toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoi hieu lang - hanh ((trinh cua) or (trinh han)) thong cong hach toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoi hieu lang - hanh ((trinh cua) OR (trinh han)) thong cong hach toan cao.
• Adding a wildcard symbol may retrieve word variants: hoi hieu lang - hanh ((trinh cua) or (trinh han)) thong cong hach toan cao*.