Perhaps you should try some spelling variations:
dau tien » van tien
sang tao » hang tai
hanh lan » thanh lan, hanh lam, hanh san
lan dau » van dau, ban dau, han dau
sach tu » sach thu, cach tu, sach ty
tu sach » thu sach, su sach, te sach
hieu so » thieu so
so cham » so kham, co cham, so chat
tao hoi » tao khoi, tao boi, tay hoi
tu sang » thu sang, tu san, tu lang
uoc va » nuoc va, duoc va, quoc va
loc va » hoc va, luc va
goc va » hoc va, doc 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 sang tao hoi. hieu so cham ((((goc va) OR (uoc va))) OR (loc va)) hanh lan dau tien~.
• Adding a wildcard symbol may retrieve word variants: tu sach tu sang tao hoi. hieu so cham ((((goc va) or (uoc va))) or (loc va)) hanh lan dau tien*.