Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
cua tre » cua te, cua triet, dua tren
danh ca » dan ca, doanh cua, danh cho
va danh » va dinh, va dan, va hanh
sach ky » sac ky, sach y, sach ty
cac xuc » cam xuc, cac nuoc, chat xuc
nang ma » tang ma, sang ma, nang cao
hieu va » lieu va
cuu tre » cau tren, cau treo
xuc va » duc va, tuc va, luc va
ma hoi » mai hoi, xa hoi, ma hoa

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