Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thanh lay » thanh lap, thanh tay, thanh lam
cua triet » cua viet, su triet
va triet » va thiet, va trien, ve triet
hieu ve » hieu va, hieu van
cam tuc » cam xuc, cam tu, nam thuc
tuc ban » thuc ban, truc ban, tu ban
sach ty » sach y, sach tu, sach thu
cua tre » cua te, cuu tre, dua tren
ty nang » ky nang, ty xang, ty hang
vu sach » vu bach, su sach, vu khach
ve cam » ve cham, ve cac, va cam

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach ty nang x ho. hieu ve cam tuc ban thanh lay ((cua tre) or (((cua triet) or (va triet))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ty nang x ho. hieu ve cam tuc ban thanh lay ((cua tre) OR (((cua triet) OR (va triet)))).
• Adding a wildcard symbol may retrieve word variants: vu sach ty nang x ho. hieu ve cam tuc ban thanh lay ((cua tre) or (((cua triet) or (va triet))))*.