Perhaps you should try some spelling variations:
chat tai » chat thai, cao tai, khau tai
dang xay » dang van, van xay
chat tre » chay tren, cho tre, choi tre
cac nuoc » cap nuoc, hoc nuoc, dat nuoc
tu sach » thu sach, su sach, tu cach
xay hoi » xa hoi, tay hoi, cay phoi
ky dang » ky nang, ky danh
te sach » toc sach
hieu va » lieu va, hieu qua
da lam » va lam
va da » va dao, va dau, va dap

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) or (te sach)) ky dang xay hoi. hieu va cac nuoc va da lam ((chat tre) or (chat tai))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) ky dang xay hoi. hieu va cac nuoc va da lam ((chat tre) OR (chat tai)).
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (te sach)) ky dang xay hoi. hieu va cac nuoc va da lam ((chat tre) or (chat tai))*.