Perhaps you should try some spelling variations:
thanh trung » thanh tung
lieu tinh » trieu tinh, diep tinh, bien tinh
trung cua » truong cua, trung tuan, trung cap
tong cong » trong cong, cong cong, dung cong
hoc lieu » hoc dieu, hoc sieu, hoc tieu
cua tong » cua cong, cua dong, cua nong
cong tan » cong tac, cong san, cong thanh
toan tai » toan tap, doanh tai, von tai
toan cao » toan tap
toan ban » van ban

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

• If you are trying to use Boolean operators, they must be ALL CAPS: hoc lieu tinh - thanh trung cua tong cong tan ((((toan tai) OR (toan cao))) OR (toan ban))~.
• Adding a wildcard symbol may retrieve word variants: hoc lieu tinh - thanh trung cua tong cong tan ((((toan tai) or (toan cao))) or (toan ban))*.