Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
hieu van » thien van, lieu va
cau phuc » cau truc, chau phu, huu phuc
hieu va » lieu va, hieu qua
phuc va » phuc vu, thuc va, chuc va
va hanh » van hanh, va thanh, va danh
cuu tre » cua tre, cau tren, cau treo
y nang » ky nang, ly nang, v nang
vi cuu » vi luu, vinh cuu
x hoi » xa hoi, o hoi, x ho

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