Perhaps you should try some spelling variations:
hanh trinh » hanh chinh
hoc trieu » hoc tieu, hoc dieu, hoc thiet
hoc thieu » toc thieu, hoc hien
dung cong » dung trong
cong san » cong tac
san phan » san pham, van phan, sat phan
phan dau » phan tu, hang dau
va dung » van dung, va duong, vat dung

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc trieu) OR (hoc thieu)) tinh - ((hanh trinh) or (canh tranh)) va dung cong san phan dau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc trieu) OR (hoc thieu)) tinh - ((hanh trinh) OR (canh tranh)) va dung cong san phan dau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc trieu) OR (hoc thieu)) tinh - ((hanh trinh) or (canh tranh)) va dung cong san phan dau".
• Adding a wildcard symbol may retrieve word variants: ((hoc trieu) OR (hoc thieu)) tinh - ((hanh trinh) or (canh tranh)) va dung cong san phan dau*.