Perhaps you should try some spelling variations:
thanh tung » thanh cong
nhung cong » dung cong, thong cong, hang cong
hoc thieu » toc thieu, hoc hien
cua nhung » va nhung
ho chieu » theo chieu, doi chieu, mot chieu
tung cua » trung cua, tuong cua, dung cua
cong tac » cong ty
khan cap » than cap, khoan cam, phan cac
khan ap » han ap, khan dam

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((ho chieu) OR (hoc thieu)) xanh - thanh tung cua nhung cong tac ((khan cap) or (khan ap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (hoc thieu)) xanh - thanh tung cua nhung cong tac ((khan cap) OR (khan ap)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) OR (hoc thieu)) xanh - thanh tung cua nhung cong tac ((khan cap) or (khan ap))".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) OR (hoc thieu)) xanh - thanh tung cua nhung cong tac ((khan cap) or (khan ap))*.