Perhaps you should try some spelling variations:
khien dong » nhiet dong, dien dong, bien dong
hoc khien » hoc hien, hoc nghien, hoc thieu
hanh tinh » hanh trinh, nhanh tinh, thanh tinh
hang cong » dang cong, hang nong, bang cong
tinh cua » trinh cua, sinh cua, tinh chat
van tang » van thang, van trang, van nang
van hang » van khang, van hoang, van thang

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc khien dong - hanh tinh cua ((ung dung) or (hang cong)) ((van tang) or (van hang)) bang~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc khien dong - hanh tinh cua ((ung dung) OR (hang cong)) ((van tang) OR (van hang)) bang.
• Adding a wildcard symbol may retrieve word variants: hoc khien dong - hanh tinh cua ((ung dung) or (hang cong)) ((van tang) or (van hang)) bang*.