Perhaps you should try some spelling variations:
thieu tinh » trieu tinh, chieu tinh, thien tinh
thanh tung » thanh cong
thong cong » trong cong, thong thong, phong chong
hoc thieu » toc thieu, hoc hien
tong cong » trong cong, cong cong, dung cong
tung cua » trung cua, tuong cua, dung cua
san phan » san pham, van phan, sat phan

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thieu tinh - thanh tung cua ((thong cong) or (tong cong)) san phan tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu tinh - thanh tung cua ((thong cong) OR (tong cong)) san phan tu.
• Adding a wildcard symbol may retrieve word variants: hoc thieu tinh - thanh tung cua ((thong cong) or (tong cong)) san phan tu*.