Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
toc sach » hoc sach, doc sach, thuoc sach
nang lai » nang tai, mang lai, nang cai
lai hoi » dai hoi, lai hoa, lai roi
ty nang » ky nang, ty xang, ty hang
hieu ve » hieu va, hieu van
sach ty » sach y, sach tu, sach thu
toc gia » toc giay, tac gia, quoc gia
cua tre » cua te, cuu tre, dua tren
tuc gia » tac gia, duc gia, luc gia
ve cam » ve cham, ve cac, va cam
anh vi » hanh vi, anh va, anh ve

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 ty nang lai hoi. hieu ve cam ((tuc gia) OR (toc gia)) anh vi ((cua tre) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ty nang lai hoi. hieu ve cam ((tuc gia) OR (toc gia)) anh vi ((cua tre) OR (cua triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ty nang lai hoi. hieu ve cam ((tuc gia) OR (toc gia)) anh vi ((cua tre) or (cua triet))".
• Adding a wildcard symbol may retrieve word variants: toc sach ty nang lai hoi. hieu ve cam ((tuc gia) OR (toc gia)) anh vi ((cua tre) or (cua triet))*.