Perhaps you should try some spelling variations:
thanh tung » thanh cong
trinh phan » trinh han, trinh quan, thanh phan
dang cong » dung cong
tung cua » trung cua, tuong cua, dung cua
cua dang » cua cong, cua ban
phan cau » phan dau, phan cac, phan tu
hoc kim » nhuoc kim, hoc kinh, hoc kham
hoc ki » hoc ky, hoc kinh, hoc khoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc kim) OR (hoc ki)) ngan - thanh tung cua dang cong trinh phan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc kim) OR (hoc ki)) ngan - thanh tung cua dang cong trinh phan cau".
• Adding a wildcard symbol may retrieve word variants: ((hoc kim) OR (hoc ki)) ngan - thanh tung cua dang cong trinh phan cau*.