Perhaps you should try some spelling variations:
thanh dai » thanh hai, thanh tai, thanh dat
thanh hoa » thanh pho
nang cac » nang cao, bang cac, hang cac
cac khoi » cac thoi, cac khoan, cach thoi
cua tre » cua te, cua triet, dua tren
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
hieu va » lieu va, hieu qua
ty nang » ky nang, ty xang, ty hang
cuu tre » cau tren, cau treo
xuc va » duc va, tuc va, luc va
va cam » va cham, va cac, va cao

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 ty nang cac khoi. hieu va cam xuc va ((thanh dai) or (thanh hoa)) ((cua tre) OR (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty nang cac khoi. hieu va cam xuc va ((thanh dai) OR (thanh hoa)) ((cua tre) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty nang cac khoi. hieu va cam xuc va ((thanh dai) or (thanh hoa)) ((cua tre) OR (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang cac khoi. hieu va cam xuc va ((thanh dai) or (thanh hoa)) ((cua tre) OR (cuu tre))*.