Perhaps you should try some spelling variations:
thanh trung » thanh tung
thiet tach » chiet tach, thien hach, thuat tach
hoc thiet » hoc thieu, hoc thuyet, hoc hien
nang cong » nang song, dang cong, bang cong
tam nang » cam nang, tam nong, nam nang
cong dan » cong san, cong tan, huong dan
dan phan » doan phan, dan chan, van 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 thiet tach - thanh trung tam nang cong dan phan tu~.
• Adding a wildcard symbol may retrieve word variants: hoc thiet tach - thanh trung tam nang cong dan phan tu*.