Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
tac dung » sach dung, xay dung, tin dung
dung ban » dung san, dung dan, dong ban
ban hang » ngan hang
hang loi » thang loi, hang doi, tang loi
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
hieu ve » hieu va, hieu van
cua tre » cuu tre, cua triet, dua tren
ve tac » va tac, ve cac, ve tai
cua te » cua tu
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ty nang x hoi. hieu ve tac dung ban hang loi ((cua tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ty nang x hoi. hieu ve tac dung ban hang loi ((cua tre) OR (cua te)).
• Adding a wildcard symbol may retrieve word variants: thu sach ty nang x hoi. hieu ve tac dung ban hang loi ((cua tre) or (cua te))*.