Perhaps you should try some spelling variations:
thanh phan » thanh pho, thanh san, thanh toan
dang xay » dang van, van xay
phan quy » phan huy, pham quy, phan duy
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
ky dang » ky nang, ky danh
xay hoi » xa hoi, tay hoi, cay phoi
hieu ve » hieu va, hieu van
ve chat » va chat, van chat
thuc va » thuc vat, thuc dan, thuc day
quy tre » luy tre

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 ky dang xay hoi. hieu ve chat ((tuc xa) or (thuc va)) thanh phan quy tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky dang xay hoi. hieu ve chat ((tuc xa) OR (thuc va)) thanh phan quy tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ky dang xay hoi. hieu ve chat ((tuc xa) or (thuc va)) thanh phan quy tre*.