Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
hanh trang » thanh trung, canh tranh, minh trang
thong cong » trong cong, tong cong, thong thong
hieu cach » hieu cac, chieu sach, hieu ca
hang cong » dang cong, hang nong, bang cong
hoc hieu » hoc thieu, hoc hien, doc hieu
van tuan » van quan, van ban, anh tuan
tuan cau » toan cau, quan cau, tuan cu

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 - ((hanh trang) or (hanh trinh)) va ((hang cong) or (thong cong)) van tuan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu cach - ((hanh trang) OR (hanh trinh)) va ((hang cong) OR (thong cong)) van tuan cau.
• Adding a wildcard symbol may retrieve word variants: hoc hieu cach - ((hanh trang) or (hanh trinh)) va ((hang cong) or (thong cong)) van tuan cau*.