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