Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc cac, hoc anh
hieu cao » chieu cao, hieu cac, kieu cao
chat xuc » chat huu, cam xuc, chao xu
va doanh » van doanh, vay doanh, va danh
sach ky » sac ky, sach y, sach ty
nang ma » tang ma, sang ma, nang cao
hieu ca » hieu cac, hieu cua, hieu va
cuc tre » duc tre, cuu tre, cuc thue
cua tre » cua te, cuu tre, cua triet
ma hoi » mai hoi, xa hoi, ma hoa
xuc va » duc va, tuc va, luc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc sach ky nang ma hoi. ((hieu cao) or (hieu ca)) chat xuc va doanh tai ((cuc tre) OR (cua tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sach ky nang ma hoi. ((hieu cao) OR (hieu ca)) chat xuc va doanh tai ((cuc tre) OR (cua tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc sach ky nang ma hoi. ((hieu cao) or (hieu ca)) chat xuc va doanh tai ((cuc tre) OR (cua tre))".
• Adding a wildcard symbol may retrieve word variants: hoc sach ky nang ma hoi. ((hieu cao) or (hieu ca)) chat xuc va doanh tai ((cuc tre) OR (cua tre))*.