Perhaps you should try some spelling variations:
thanh lap » thanh san, phan lap, thanh hai
ban thanh » ban hanh, ban hang
sach tay » xach tay, sach hay, sach nay
tay dung » xay dung, tac dung, tay nung
chat luc » chat xuc, chat lua, nhan luc
dua tren » dung tren
tu sach » thu sach, su sach, te sach
tai hoi » tai khoi, dai hoi, tai hai
hieu ve » hieu va, hieu van
ve chat » va chat, van chat
luc ban » duc ban, cuc ban, luc bat
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: tu sach tay dung tai hoi. hieu ve chat luc ban thanh lap ((dua tren) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach tay dung tai hoi. hieu ve chat luc ban thanh lap ((dua tren) OR (cua te)).
• Adding a wildcard symbol may retrieve word variants: tu sach tay dung tai hoi. hieu ve chat luc ban thanh lap ((dua tren) or (cua te))*.