Perhaps you should try some spelling variations:
thanh tung » thanh cong
nhung cong » dung cong, thong cong, hang cong
lieu tinh » trieu tinh, diep tinh, bien tinh
cua nhung » va nhung
cong toan » cong tan, cong hoan, cong tuan
khoan cap » khoan cam, khan cap, khoan va
tung cua » trung cua, tuong cua, dung cua
khoa cap » khoa cam, khoa tap, khoa can
ho lieu » so lieu, co lieu, ho kieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho lieu tinh - thanh tung cua nhung cong toan ((khoan cap) or (khoa cap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho lieu tinh - thanh tung cua nhung cong toan ((khoan cap) OR (khoa cap)).
• Adding a wildcard symbol may retrieve word variants: ho lieu tinh - thanh tung cua nhung cong toan ((khoan cap) or (khoa cap))*.