Perhaps you should try some spelling variations:
nhanh thang » nhanh thanh, nhanh quang, hanh trang
trung nhanh » trung thanh, trung khanh, trung nhan
hanh trung » thanh trung, hanh trang, manh trung
chieu sach » chinh sach, chiet tach, chieu sang
thang cong » thanh cong, thang long, thong cong
hieu cach » hieu cac, hieu ca, biet cach
cong san » cong tac
toan cau » toan ban, toan tap, toan tai
toan cao » toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((hieu cach) or (chieu sach)) - hanh trung nhanh thang cong san ((toan cau) OR (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu cach) OR (chieu sach)) - hanh trung nhanh thang cong san ((toan cau) OR (toan cao)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hieu cach) or (chieu sach)) - hanh trung nhanh thang cong san ((toan cau) OR (toan cao))".
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu cach) or (chieu sach)) - hanh trung nhanh thang cong san ((toan cau) OR (toan cao))*.