Perhaps you should try some spelling variations:
sach tay » xach tay, sach hay, sach nay
hang tai » hang va, dung tai
thuc ban » thuoc ban, thuc dan, thu ban
truc ban » truc dan, truc van, truoc bang
su triet » su viet, su tien, ve triet
dung xay » dang xay, dung may, dung tay
tay dung » xay dung, tac dung, tay nung
va cham » va chat, va tham
hieu va » lieu va, hieu qua
xay hoi » xa hoi, tay hoi, cay phoi
su sach » so sach, vu sach
tai su » tai so, tai tu, lai su

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 tay dung xay hoi. hieu va cham ((truc ban) or (thuc ban)) hang tai su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach tay dung xay hoi. hieu va cham ((truc ban) OR (thuc ban)) hang tai su triet.
• Adding a wildcard symbol may retrieve word variants: su sach tay dung xay hoi. hieu va cham ((truc ban) or (thuc ban)) hang tai su triet*.