Perhaps you should try some spelling variations:
nhieu viec » nhien viet
hieu viec » hieu ve, sieu viet, hieu hien
dang xay » dang van, van xay
sach ky » sac ky, sach y, sach ty
tinh he » trinh he, hinh he, tinh ha
su sach » so sach, vu sach
xay hoi » xa hoi, tay hoi, cay phoi
ky dang » ky nang, ky danh
cua tre » cua te, cuu tre, cua triet
xuc va » duc va, luc va, xac va
tuc va » thuc va, truc va, tuc xa
he cua » le cua, hu cua, de cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ky dang xay hoi. ((nhieu viec) or (hieu viec)) cam ((xuc va) OR (tuc va)) tinh he cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky dang xay hoi. ((nhieu viec) OR (hieu viec)) cam ((xuc va) OR (tuc va)) tinh he cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky dang xay hoi. ((nhieu viec) or (hieu viec)) cam ((xuc va) OR (tuc va)) tinh he cua tre".
• Adding a wildcard symbol may retrieve word variants: su sach ky dang xay hoi. ((nhieu viec) or (hieu viec)) cam ((xuc va) OR (tuc va)) tinh he cua tre*.