Perhaps you should try some spelling variations:
dang xay » dang van, van xay
va trien » va truyen, va thiet, va tuyen
te sach » toc sach
sach ky » sac ky, sach y, sach ty
ky dang » ky nang, ky danh
xay hoi » xa hoi, tay hoi, cay phoi
qua cam » qua cham, qua cac, qua ca
xuc van » duc van, luc van, xuc ban
vuc van » duc van, luc van, thuc van
hanh ve » hanh vi, hanh va, hanh kem
ve va » ve van, te va, ke va

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 ky dang xay hoi. hieu qua cam ((xuc van) or (vuc van)) hanh ve va trien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky dang xay hoi. hieu qua cam ((xuc van) OR (vuc van)) hanh ve va trien.
• Adding a wildcard symbol may retrieve word variants: te sach ky dang xay hoi. hieu qua cam ((xuc van) or (vuc van)) hanh ve va trien*.