Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu xanh » chieu sach, chieu sang, chieu tinh
hieu lang » chieu sang, hieu quang, nhieu tang
trung cua » truong cua, trung tuan, trung cap
tong hung » trong hung, cong hung, tong ung
hung manh » nhung manh, hung anh, tung manh
cua tong » cua cong, cua dong, cua nong

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 ((hieu lang) OR (chieu xanh)) - thanh trung cua tong hung manh ((toan ban) OR (van ban))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hieu lang) or (chieu xanh)) - thanh trung cua tong hung manh ((toan ban) OR (van ban))~".
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu lang) or (chieu xanh)) - thanh trung cua tong hung manh ((toan ban) OR (van ban))*.