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

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) or (v nang)) x ho. ((hieu van) or (hieu va)) cau phuc van hanh vi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ((y nang) OR (v nang)) x ho. ((hieu van) OR (hieu va)) cau phuc van hanh vi cuu tre.
• Adding a wildcard symbol may retrieve word variants: thu sach ((y nang) or (v nang)) x ho. ((hieu van) or (hieu va)) cau phuc van hanh vi cuu tre*.