Perhaps you should try some spelling variations:
thu dang » thu hang, thu dong, thu sang
thu bang » thu ban, thu hang, chu bang
qua pham » quan pham, quy pham, qua cham
ban hanh » ban hang
hanh vai » hanh vi, hanh va, hanh tai
dua tren » dung tren
su sach » so sach, vu sach
duc ban » duc tan, duc van, dua ban
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ((thu dang) OR (thu bang)) xa hoi. hieu qua pham duc ban hanh vai ((dua tren) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((thu dang) OR (thu bang)) xa hoi. hieu qua pham duc ban hanh vai ((dua tren) OR (cua te)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((thu dang) OR (thu bang)) xa hoi. hieu qua pham duc ban hanh vai ((dua tren) or (cua te))".
• Adding a wildcard symbol may retrieve word variants: su sach ((thu dang) OR (thu bang)) xa hoi. hieu qua pham duc ban hanh vai ((dua tren) or (cua te))*.