Perhaps you should try some spelling variations:
dang xay » dang van, van xay
luoc van » luoc can, luoc va, luot van
hanh tai » thanh tai, hang tai, han tai
su sach » vu sach
tai cua » thai cua, tai cuc, tri cua
so sach » so sanh, bo sach, co sach
ky dang » ky nang, ky danh
xay hoi » xa hoi, tay hoi, cay phoi
luc van » luu van, duc van, luc va
va cao » va cac, va co, va dao
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) OR (so sach)) ky dang xay hoi. lieu va cao ((luc van) or (luoc van)) hanh tai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sach)) ky dang xay hoi. lieu va cao ((luc van) OR (luoc van)) hanh tai cua te*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) OR (so sach)) ky dang xay hoi. lieu va cao ((luc van) or (luoc van)) hanh tai cua te*".