Perhaps you should try some spelling variations:
dung dang » dung dan, dung dong, dung danh
gian lang » gian dan
lang dieu » dang dieu, sang dieu, lan dieu
dang van » hoang van, hang va
tinh qua » tinh quan, trinh qua, tinh cua
qua gian » qua giang, qua gia, qua giai
dieu hat » dieu hanh, dieu khac, dieu can

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( tin dung dang van ((hieu luat) or (hieu qua)) ) or ( tinh qua gian lang dieu hat ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tin dung dang van ((hieu luat) OR (hieu qua)) ) OR ( tinh qua gian lang dieu hat )).
• Adding a wildcard symbol may retrieve word variants: (( tin dung dang van ((hieu luat) or (hieu qua)) ) or ( tinh qua gian lang dieu hat ))*.