Perhaps you should try some spelling variations:
tinh vinh » tinh ninh, tinh binh, tinh hinh
hieu van » hieu va, thien van, lieu va
vinh cuu » dinh cuu, sinh cua, dinh cu
va tinh » may tinh
lam tuc » lam thuoc, lam truoc, luat tuc
van lam » van nam
tu sach » thu sach, te sach, tu cach
ly nang » ky nang, ly hang, ly vang
su sach » so sach, vu sach
cuu tre » cua tre, cau tren, cau treo
tuc va » thuc va, truc va, tuc xa
y nang » ky nang, v nang, may nang
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) or (su sach)) ((y nang) OR (ly nang)) x hoi. hieu van lam tuc va tinh vinh cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) ((y nang) OR (ly nang)) x hoi. hieu van lam tuc va tinh vinh cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (su sach)) ((y nang) OR (ly nang)) x hoi. hieu van lam tuc va tinh vinh cuu tre".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (su sach)) ((y nang) OR (ly nang)) x hoi. hieu van lam tuc va tinh vinh cuu tre*.