Perhaps you should try some spelling variations:
nhanh lang » nhanh quang, nhanh thang, nhan dang
nhung cong » dung cong, thong cong, hang cong
hanh mang » nhanh mang, hanh trang, thanh hang
hoi hieu » hoi phieu, hoi tieu, moi hieu
cong tan » cong tac, cong san, cong thanh
tan toan » tan tran, tap toan, van toan
toan cao » toan ban, toan tap
ho hieu » ho chieu, nho hieu, co hieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((ho hieu) or (hoi hieu)) lang - ((hanh mang) OR (nhanh lang)) va nhung cong tan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho hieu) OR (hoi hieu)) lang - ((hanh mang) OR (nhanh lang)) va nhung cong tan toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho hieu) or (hoi hieu)) lang - ((hanh mang) OR (nhanh lang)) va nhung cong tan toan cao".
• Adding a wildcard symbol may retrieve word variants: ((ho hieu) or (hoi hieu)) lang - ((hanh mang) OR (nhanh lang)) va nhung cong tan toan cao*.