Perhaps you should try some spelling variations:
hanh sinh » hanh tinh, hanh dinh, hinh sinh
hieu van » hieu va, thien van, lieu va
sinh cuu » dinh cuu, sinh cua, sinh cau
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
van cam » van nam, van lam, van cau
luu van » cuu van, luan van, luu hanh
duc van » duc va, duc tan, duc manh
cuu tre » cua tre, cau tren, cau treo
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: tu sach ty nang x hoi. hieu van cam ((luu van) or (duc van)) hanh sinh cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty nang x hoi. hieu van cam ((luu van) OR (duc van)) hanh sinh cuu tre*.