Perhaps you should try some spelling variations:
hinh thai » sinh thai, tinh thai, dinh thi
thai cua » than cua, tai cuc, tri cua
duc manh » suc manh, duc anh, duc minh
danh xay » dang xay, manh xay, anh xay
cua tre » cua te, cuu tre, cua triet
duc van » duc va, duc tan, duc phan
hieu ve » hieu va, hieu van
xay hoi » xa hoi, tay hoi, cay phoi
ky danh » ky anh, ky dang
ve cam » ve cham, ve cac, va cam
su tai » su thi, tu tai
su sai » su hai, su dai, su mai

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((su sai) or (su tai)) ky danh xay hoi. hieu ve cam ((duc van) or (duc manh)) hinh thai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sai) OR (su tai)) ky danh xay hoi. hieu ve cam ((duc van) OR (duc manh)) hinh thai cua tre.
• Adding a wildcard symbol may retrieve word variants: ((su sai) or (su tai)) ky danh xay hoi. hieu ve cam ((duc van) or (duc manh)) hinh thai cua tre*.