Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sang » chieu sach, chieu xanh, hieu lang
hieu manh » chieu xanh, hieu nganh, dieu hanh
trung cua » truong cua, trung tuan, trung cap
cua thong » cua thuong, cua khong, cua tong
thong van » trong van, thong va, thong quan
chinh can » chinh ca, chinh ban, chinh cau
phan cau » phan dau, phan cac, phan tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((hieu manh) or (chieu sang)) - thanh trung cua thong thong van ((chinh can) or (phan cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((hieu manh) OR (chieu sang)) - thanh trung cua thong thong van ((chinh can) OR (phan cau)).
• Adding a wildcard symbol may retrieve word variants: ho ((hieu manh) or (chieu sang)) - thanh trung cua thong thong van ((chinh can) or (phan cau))*.