Perhaps you should try some spelling variations:
nhieu viec » hieu viec, nhien viet
thuoc cao » thuoc co, thuoc bao, thuoc giao
toc sach » hoc sach, doc sach, thuoc sach
viec dan » viec dang, viec ban, viec dat
thuc cao » thuc co, thuc can, thuat cao
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
cuu tre » cua tre, cau tren, cau treo
dan vi » doan vi, don vi, dan va
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: toc sach ty nang x hoi. nhieu viec dan ((thuc cao) OR (thuoc cao)) dan vi cuu tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ty nang x hoi. nhieu viec dan ((thuc cao) OR (thuoc cao)) dan vi cuu tre".
• Adding a wildcard symbol may retrieve word variants: toc sach ty nang x hoi. nhieu viec dan ((thuc cao) OR (thuoc cao)) dan vi cuu tre*.