Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
toc sach » hoc sach, doc sach, thuoc sach
hieu cao » chieu cao, hieu cac, hieu ca
chat luc » chat xuc, chat lua, nhan luc
sach ky » sac ky, sach y, sach ty
luc van » luoc van, luu van, duc van
hanh ve » hanh vi, hanh va
cua tre » cua te, cuu tre, dua tren
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: toc sach ky nang x hoi. hieu cao chat luc van ((hanh ve) or (hanh kem)) ((cua tre) OR (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ky nang x hoi. hieu cao chat luc van ((hanh ve) OR (hanh kem)) ((cua tre) OR (cua triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ky nang x hoi. hieu cao chat luc van ((hanh ve) or (hanh kem)) ((cua tre) OR (cua triet))".
• Adding a wildcard symbol may retrieve word variants: toc sach ky nang x hoi. hieu cao chat luc van ((hanh ve) or (hanh kem)) ((cua tre) OR (cua triet))*.