Perhaps you should try some spelling variations:
thien dang » thien bang, thien danh, thien nang
dung huong » dung thuong, dung phuong, dong huong
hien hanh » dieu hanh
hanh sinh » hanh dinh, hinh sinh, hanh chinh
hanh tinh » hanh trinh, nhanh tinh, thanh tinh
huong ban » huong dan, huong ben, huong lan
cua dung » cua dang, cua dong, qua dung
ban than » ban thanh, van thanh, ban hang
than lap » thanh lap, phan lap, toan lap

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((hien hanh) or (thien dang)) - ((hanh sinh) OR (hanh tinh)) cua dung huong ban than lap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien hanh) OR (thien dang)) - ((hanh sinh) OR (hanh tinh)) cua dung huong ban than lap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien hanh) or (thien dang)) - ((hanh sinh) OR (hanh tinh)) cua dung huong ban than lap".
• Adding a wildcard symbol may retrieve word variants: hoc ((hien hanh) or (thien dang)) - ((hanh sinh) OR (hanh tinh)) cua dung huong ban than lap*.