Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
nhan luc » nang luc
hieu van » hieu va, thien van, lieu va
van hanh » van thanh, ban hanh, van anh
cua tre » cua te, cua triet, dua tren
hanh di » hanh vi, hanh de, hang di
cuu tre » cau tren, cau treo
sach ky » sac ky, sach y, sach ty
tang ma » mang may, tang van
ky tang » ky nang, ky dang, kho tang
ha luc » ha duc, than luc

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ky tang ma hoa. hieu van ((ha luc) OR (nhan luc)) van hanh di ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky tang ma hoa. hieu van ((ha luc) OR (nhan luc)) van hanh di ((cua tre) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach ky tang ma hoa. hieu van ((ha luc) OR (nhan luc)) van hanh di ((cua tre) or (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: thu sach ky tang ma hoa. hieu van ((ha luc) OR (nhan luc)) van hanh di ((cua tre) or (cuu tre))*.