Perhaps you should try some spelling variations:
doc sach » hoc sach, toc sach, nuoc sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
va hang » van hang, va nang, va lang
hang di » hang doi, hang vi, hang dien
cuu tre » cua tre, cau tren, cau treo
va cam » va cham, va cao, va cai
di cuu » di cau, di cua, dinh 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: doc sach ty nang x hoi. hieu ((va cam) OR (va cac)) tu va hang di cuu tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc sach ty nang x hoi. hieu ((va cam) OR (va cac)) tu va hang di cuu tre".
• Adding a wildcard symbol may retrieve word variants: doc sach ty nang x hoi. hieu ((va cam) OR (va cac)) tu va hang di cuu tre*.