Perhaps you should try some spelling variations:
thanh trung » thanh tung
thieu xanh » chieu xanh, hieu manh, thien danh
thien anh » thien danh, tien anh, thien thanh
trung cua » truong cua, trung tuan, trung cap
tac nhanh » tac nhan, tac thanh, cach nhanh
tai nhanh » tai thanh, thai thanh, tai chinh
van cong » van dong, van phong, phan cong
cua van » cua ban, cua vat, cua dan

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((thieu xanh) OR (thien anh)) - thanh trung cua van cong ((tac nhanh) or (tai nhanh)) ha~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu xanh) OR (thien anh)) - thanh trung cua van cong ((tac nhanh) OR (tai nhanh)) ha.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu xanh) OR (thien anh)) - thanh trung cua van cong ((tac nhanh) or (tai nhanh)) ha".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu xanh) OR (thien anh)) - thanh trung cua van cong ((tac nhanh) or (tai nhanh)) ha*.