Perhaps you should try some spelling variations:
khong cong » thong cong, khong cang, chong cong
hoc thiet » hoc thieu, hoc thuyet, toc thieu
cua khong » hua khong, cua phuong, cua thuong
cong cua » cong cu, dong cua, huong cua
cong tan » cong tac, cong san, cong thanh
ban cau » bang cau, ban can, van cau
ban dan » ban hang, ban hanh, ban quan

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc thiet) or (hoc hien)) anh - thanh cong cua khong cong tan ((ban cau) or (ban dan))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc thiet) OR (hoc hien)) anh - thanh cong cua khong cong tan ((ban cau) OR (ban dan)).
• Adding a wildcard symbol may retrieve word variants: ((hoc thiet) or (hoc hien)) anh - thanh cong cua khong cong tan ((ban cau) or (ban dan))*.