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

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) OR (thuc day)))) thanh van 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) OR (thuc day)))) thanh van quy tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky dang xay hoi. hieu ve chat ((tuc xa) or (((thuc va) OR (thuc day)))) thanh van quy tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ky dang xay hoi. hieu ve chat ((tuc xa) or (((thuc va) OR (thuc day)))) thanh van quy tre*.