Perhaps you should try some spelling variations:
va thanh » gia thanh, ban thanh, le thanh
thai cua » than cua, tai cuc, tri cua
dang cay » dang xay, dang ca, dang cac
cay phoi » cap phoi, tay hoi, cay cho
hieu van » hieu va, thien van, lieu va
cua tre » cua te, cuu tre, cua triet
va tinh » may tinh
van lam » van nam
lam xuc » cam xuc, lam duoc
ky dang » ky nang, ky danh
su cac » tu cac, su cao, su can
su sac » su sach, su xac

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((su sac) OR (su cac)) ky dang cay phoi. hieu van lam xuc ((va thanh) or (va tinh)) thai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sac) OR (su cac)) ky dang cay phoi. hieu van lam xuc ((va thanh) OR (va tinh)) thai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sac) OR (su cac)) ky dang cay phoi. hieu van lam xuc ((va thanh) or (va tinh)) thai cua tre".
• Adding a wildcard symbol may retrieve word variants: ((su sac) OR (su cac)) ky dang cay phoi. hieu van lam xuc ((va thanh) or (va tinh)) thai cua tre*.