Perhaps you should try some spelling variations:
te sach » toc sach
son hai » cong hai
hieu va » lieu va, hieu qua
xuc ban » duc ban, cuc ban, quoc ban
anh dai » vanh dai, anh bai, anh dat
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, may nang
v nang » va nang, vu nang, van nang

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ((y nang) or (v nang)) son hai. hieu va cac ((xuc ban) or (duc tan)) anh dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((y nang) OR (v nang)) son hai. hieu va cac ((xuc ban) OR (duc tan)) anh dai cua tre.
• Adding a wildcard symbol may retrieve word variants: te sach ((y nang) or (v nang)) son hai. hieu va cac ((xuc ban) or (duc tan)) anh dai cua tre*.