Perhaps you should try some spelling variations:
hanh trinh » hanh chinh
hanh trang » thanh trung, minh trang, tinh trang
hieu lang » chieu sang, hieu quang, nhieu tang
quan dung » quang dung, quan duong, qua dung
dung cong » dung trong
cong tinh » cong trinh, cong vinh, long tinh
hoc hieu » hoc thieu, hoc hien, doc hieu
toan cau » 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 hieu lang - ((hanh trang) or (((hanh trinh) OR (canh tranh)))) quan dung cong tinh toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu lang - ((hanh trang) OR (((hanh trinh) OR (canh tranh)))) quan dung cong tinh toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hieu lang - ((hanh trang) or (((hanh trinh) OR (canh tranh)))) quan dung cong tinh toan cau".
• Adding a wildcard symbol may retrieve word variants: hoc hieu lang - ((hanh trang) or (((hanh trinh) OR (canh tranh)))) quan dung cong tinh toan cau*.