Perhaps you should try some spelling variations:
cau tren » cu tren, dau tren, ca tren
hanh lai » hanh lam, hanh tai, thanh lap
lai cau » lai chau, lai cam, loi cau
so cham » so kham, co cham, so chat
sach tu » sach thu, sach ty, sach uu
tao hoi » tao khoi, tao boi, tay hoi
san tao » sang tao, san bao, san tay
cach tu » cach thuc
hieu so » thieu so
soc va » hoc va, doc va, goc va
loc va » hoc va, luc va

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

• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach tu) OR (cach tu)) san tao hoi. hieu so cham ((soc va) OR (loc va)) hanh lai cau tren~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach tu) OR (cach tu)) san tao hoi. hieu so cham ((soc va) or (loc va)) hanh lai cau tren~".
• Adding a wildcard symbol may retrieve word variants: tu ((sach tu) OR (cach tu)) san tao hoi. hieu so cham ((soc va) or (loc va)) hanh lai cau tren*.