Perhaps you should try some spelling variations:
hanh trang » thanh trung, canh tranh, hanh trinh
chieu sach » chinh sach, chiet tach, chieu sang
nhung cong » dung cong, thong cong, nhung don
hieu cach » hieu cac, hieu ca, biet cach
trang cua » tranh cua, tang cua, trung cua
hang cong » dang cong, hang nong, bang cong
dan than » dan chan, ban than, van than
than cau » toan cau, phan cau, than cap

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 trang cua ((nhung cong) OR (hang cong)) dan than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu cach) OR (chieu sach)) - hanh trang cua ((nhung cong) OR (hang cong)) dan than cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hieu cach) or (chieu sach)) - hanh trang cua ((nhung cong) OR (hang cong)) dan than cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu cach) or (chieu sach)) - hanh trang cua ((nhung cong) OR (hang cong)) dan than cau*.