Perhaps you should try some spelling variations:
thanh trung » thanh tung
cong thanh » dong thanh, cong trinh, cong tan
thanh xuat » thanh xuan, thanh dat, phan xuat
hoc thieu » toc thieu
dung cong » dung trong
trung ap » trung cap, trung lap, trung tam
xuat ban » luat ban, xuat san, thuat ban
ap dung » xay dung, van dung

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 hien) OR (hoc thieu)) tinh - thanh trung ap dung cong thanh xuat ban~.
• Adding a wildcard symbol may retrieve word variants: ((hoc hien) or (hoc thieu)) tinh - thanh trung ap dung cong thanh xuat ban*.