Perhaps you should try some spelling variations:
thien van » thi van
thanh vai » thanh hai, thanh van, thanh tai
dang xay » dang van, van xay
thac toc » cac toc, thac cac, thi toc
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
ky dang » ky nang, ky danh
xay hoi » xa hoi, tay hoi, cay phoi
hac tuc » thai tuc
vai cua » dai cua, hai cua, lai cua
cua te » cua tu

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. thien van ((hac tuc) or (thac toc)) gia thanh vai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky dang xay hoi. thien van ((hac tuc) OR (thac toc)) gia thanh vai cua te.
• Adding a wildcard symbol may retrieve word variants: su sach ky dang xay hoi. thien van ((hac tuc) or (thac toc)) gia thanh vai cua te*.