Perhaps you should try some spelling variations:
thien dang » thien bang, thien danh, thien nang
hien hanh » dieu hanh
hanh sinh » hanh tinh, hanh dinh, hinh sinh
huong ban » huong dan, huong lan, hong ban
huong ben » huong den, cuong bien, huong dan
sinh cua » manh cua, dinh cuu, sinh va
cua dung » cua dang, cua dong, qua dung
phan lap » phan dau

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 cua dung ((huong ban) or (huong ben)) phan lap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien hanh) OR (thien dang)) - hanh sinh cua dung ((huong ban) OR (huong ben)) phan lap.
• Adding a wildcard symbol may retrieve word variants: hoc ((hien hanh) or (thien dang)) - hanh sinh cua dung ((huong ban) or (huong ben)) phan lap*.