Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
dau truc » cau truc, dai truc, doan truc
va thanh » gia thanh, ban thanh, va tinh
hieu van » hieu va, thien van, lieu va
cua tre » cuu tre, cua triet, dua tren
truc va » thuc va, thuc vat, trung va
van dau » van dao, phan dau
sach ky » sac ky, sach y, sach kem
nang xa » nang x, lang xa, nang ma
sach ty » sach y, sach tu, sach thu
cua te » cua tu

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

• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (sach ty)) nang xa hoi. hieu van dau truc va thanh vai ((cua tre) OR (cua te))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ky) or (sach ty)) nang xa hoi. hieu van dau truc va thanh vai ((cua tre) OR (cua te))~".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) or (sach ty)) nang xa hoi. hieu van dau truc va thanh vai ((cua tre) OR (cua te))*.