Perhaps you should try some spelling variations:
dien viet » tieng viet, trien viet, gian viet
viet cac » vien cac, viet ca, viet bac
doan thi » dan thi, doanh tai, doanh thu
so sach » so sanh, bo sach, co sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
cac xuc » cam xuc, cac nuoc, chat xuc
xuc cam » phuc cam
cuu tre » cua tre, cau tren, cau treo
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: so sach ty nang x hoi. dien viet cac xuc cam ((doan thi) OR (hoang thi)) cuu tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ty nang x hoi. dien viet cac xuc cam ((doan thi) OR (hoang thi)) cuu tre".
• Adding a wildcard symbol may retrieve word variants: so sach ty nang x hoi. dien viet cac xuc cam ((doan thi) OR (hoang thi)) cuu tre*.