Perhaps you should try some spelling variations:
trung thanh » truong thanh
trung tuan » trung tam, tran tuan, truong thanh
khong cong » thong cong, khong cang, chong cong
hien xanh » hien hanh, hien nhanh, chieu xanh
cong tan » cong tac, cong san, cong thanh
tan toan » tan tran, tap toan, van toan
toan cao » toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hien xanh - manh ((trung tuan) OR (trung thanh)) khong cong tan toan cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien xanh - manh ((trung tuan) OR (trung thanh)) khong cong tan toan cao".
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - manh ((trung tuan) OR (trung thanh)) khong cong tan toan cao*.