Perhaps you should try some spelling variations:
day thanh » dao thanh, dat thanh, da thanh
day manh » van manh, duc manh, ha manh
vu sach » vu bach, su sach, vu khach
sach ly » sach y, sach lo, sach ty
va cham » va chat, va tham
ve cham » ve chat, vu cham, ve chim
ly nang » ky nang, ly hang, ly vang
cua tre » cua te, cuu tre, cua triet
de cua » le cua, te cua, dieu cua
x hoi » xa hoi, o hoi, x ho

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 ly nang x hoi. hieu ((ve cham) OR (va cham)) thuc ((day manh) or (day thanh)) de cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ly nang x hoi. hieu ((ve cham) OR (va cham)) thuc ((day manh) OR (day thanh)) de cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ly nang x hoi. hieu ((ve cham) OR (va cham)) thuc ((day manh) or (day thanh)) de cua tre".
• Adding a wildcard symbol may retrieve word variants: vu sach ly nang x hoi. hieu ((ve cham) OR (va cham)) thuc ((day manh) or (day thanh)) de cua tre*.