Perhaps you should try some spelling variations:
thuat san » thuat toan, thuat song, thuat lanh
ban thanh » ban hanh, ban hang
tay xang » ty xang, tay lang, tay tang
hien cac » thien cac, vien cac, dien cac
hieu cac » hieu luc, hieu va, hieu van
thanh te » thanh ve, thanh de, thanh le
va triet » va thiet, va trien, ve triet
san tay » ban tay, dan tay, han tay
cac ban » cac dan, cac van, can ban
xang x » nang x
te va » tu va

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuat san tay xang x ho. hieu ((hien cac) or (hieu cac)) cac ban thanh te va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat san tay xang x ho. hieu ((hien cac) OR (hieu cac)) cac ban thanh te va triet.
• Adding a wildcard symbol may retrieve word variants: thuat san tay xang x ho. hieu ((hien cac) or (hieu cac)) cac ban thanh te va triet*.