Perhaps you should try some spelling variations:
thien hach » thien thanh, hien hanh
trung tuan » trung thanh, trung tam, tran tuan
hoc thien » hoc hien, hoc thieu, hoc thiet
trung cap » truong cao, trung tam
dung cong » dung trong
cong san » cong tac
san han » san phan, san van, van han
han tap » han tai, toan tap, nhan tai

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thien hach - hanh ((trung tuan) or (trung cap)) dung cong san han tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thien hach - hanh ((trung tuan) OR (trung cap)) dung cong san han tap.
• Adding a wildcard symbol may retrieve word variants: hoc thien hach - hanh ((trung tuan) or (trung cap)) dung cong san han tap*.