Perhaps you should try some spelling variations:
hanh trang » thanh trung, canh tranh, minh trang
hanh trinh » canh tranh, hanh chinh
nhung cong » dung cong, thong cong, hang cong
hoc chieu » ho chieu, hoc hien, hoc dieu
hoc thieu » toc thieu, hoc hien
cong tan » cong tac, cong san, cong thanh
tan toan » tan tran, tap toan, van toan
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 chieu) OR (hoc thieu)) tinh - ((hanh trang) or (hanh trinh)) va nhung cong tan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc chieu) OR (hoc thieu)) tinh - ((hanh trang) OR (hanh trinh)) va nhung cong tan toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc chieu) OR (hoc thieu)) tinh - ((hanh trang) or (hanh trinh)) va nhung cong tan toan cao".
• Adding a wildcard symbol may retrieve word variants: ((hoc chieu) OR (hoc thieu)) tinh - ((hanh trang) or (hanh trinh)) va nhung cong tan toan cao*.