Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
chau tinh » cuu tinh, cua tinh, cac tinh
tan thanh » tran thanh, tang thanh, toan thanh
thanh lap » thanh san, phan lap, thanh hai
trung ha » trung hoc, trung cap
cong tan » cong tac, cong san, cong thanh
ha tinh » va tinh, may tinh

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi ((chau tinh) OR (ha tinh)) - hanh ((trung ha) or (trung tam)) thong cong tan thanh lap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chau tinh) OR (ha tinh)) - hanh ((trung ha) OR (trung tam)) thong cong tan thanh lap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((chau tinh) OR (ha tinh)) - hanh ((trung ha) or (trung tam)) thong cong tan thanh lap".
• Adding a wildcard symbol may retrieve word variants: doi ((chau tinh) OR (ha tinh)) - hanh ((trung ha) or (trung tam)) thong cong tan thanh lap*.