Perhaps you should try some spelling variations:
hanh sinh » hanh tinh, hanh dinh, hinh sinh
sinh cua » manh cua, dinh cuu, sinh va
duc van » duc va, duc tan, duc manh
luc van » luoc van, luu van, luc va
te sach » toc sach
sach tu » sach thu, cach tu, sach ty
tu hang » thu hang, tu hanh, tu hung
cua tre » cua te, cuu tre, cua triet
va cam » va cham, va cac, va cao
o hai » co hai, so hai, o lai
o hoi » co hoi, o hoc, o hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach tu hang ((o hoi) or (o hai)). lieu va cam ((luc van) or (duc van)) hanh sinh cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach tu hang ((o hoi) OR (o hai)). lieu va cam ((luc van) OR (duc van)) hanh sinh cua tre.
• Adding a wildcard symbol may retrieve word variants: te sach tu hang ((o hoi) or (o hai)). lieu va cam ((luc van) or (duc van)) hanh sinh cua tre*.