Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
nang mai » nang ma, lang mai, nang cai
nang tai » hang tai, tang tai, sang tai
danh vi » hanh vi, dinh vi, danh di
va danh » va dinh, va dan, va hanh
nam xuc » nam xua, nam thuc, nam duoc
tu sach » thu sach, su sach, te sach
cuu tre » cua tre, cau tren, cau treo
vi cuu » vi luu, vinh cuu

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 y ((nang mai) OR (nang tai)) hoi. hieu van ((nam xuc) or (cam xuc)) va danh vi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y ((nang mai) OR (nang tai)) hoi. hieu van ((nam xuc) OR (cam xuc)) va danh vi cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y ((nang mai) OR (nang tai)) hoi. hieu van ((nam xuc) or (cam xuc)) va danh vi cuu tre".
• Adding a wildcard symbol may retrieve word variants: tu sach y ((nang mai) OR (nang tai)) hoi. hieu van ((nam xuc) or (cam xuc)) va danh vi cuu tre*.