Perhaps you should try some spelling variations:
hieu toc » hieu hoc, hieu tuc, sieu toc
toc cham » toc thai
quoc ban » quoc bao, quoc lan, quoc quan
tu sach » thu sach, su sach, te sach
nang ma » tang ma, sang ma, nang cao
xuc van » duc van, luc van, vuc van
cuu tre » cua tre, cau tren, cau treo
y nang » ky nang, ly nang, v nang
ma hoi » mai hoi, xa hoi, ma hoa
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: tu sach y nang ma hoi. hieu toc cham ((((xuc van) or (quoc ban))) or (duc tan)) hanh vi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang ma hoi. hieu toc cham ((((xuc van) OR (quoc ban))) OR (duc tan)) hanh vi cuu tre.
• Adding a wildcard symbol may retrieve word variants: tu sach y nang ma hoi. hieu toc cham ((((xuc van) or (quoc ban))) or (duc tan)) hanh vi cuu tre*.