Perhaps you should try some spelling variations:
trung phan » trung thanh, dung phan, trung tuan
cong thanh » dong thanh, cong trinh, cong tan
thanh toan » thanh hoa, thanh san, tinh toan
hoc thiet » hoc thuyet, hoc hien, toc thieu
hoc thieu » toc thieu, hoc hien
cong cong » cong dong, trong cong, dung cong
trung ha » trung hoc, trung tam, trung cap
toan lap » toan tap, toan lao, thanh lap

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) or (hoc thieu)) tach - hanh ((trung phan) OR (trung ha)) cong cong thanh toan lap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc thiet) OR (hoc thieu)) tach - hanh ((trung phan) OR (trung ha)) cong cong thanh toan lap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc thiet) or (hoc thieu)) tach - hanh ((trung phan) OR (trung ha)) cong cong thanh toan lap".
• Adding a wildcard symbol may retrieve word variants: ((hoc thiet) or (hoc thieu)) tach - hanh ((trung phan) OR (trung ha)) cong cong thanh toan lap*.