Perhaps you should try some spelling variations:
nang mai » nang ma, lang mai, nang cai
nang tai » hang tai, tang tai, sang tai
hieu van » hieu va, thien van, lieu va
van tham » van thanh, van tuan, van chat
tham xuc » tham nuoc, tham thuc, pham duc
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet
tu sai » tu bai, tu san, tu cai
sai ky » sac ky
xuc va » duc va, tuc va, luc va
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sai ky ((nang mai) OR (nang tai)) hoi. hieu van tham xuc va hanh vi cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sai ky ((nang mai) OR (nang tai)) hoi. hieu van tham xuc va hanh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sai ky ((nang mai) OR (nang tai)) hoi. hieu van tham xuc va hanh vi cua tre*.