Perhaps you should try some spelling variations:
dang hanh » dang thanh, ban hanh, dang van
thuc dang » thuoc dang, thuc dan, thuc dung
hanh day » hanh may, han day, hanh dao
tang van » dang van, hoang van, trong van
tu sach » thu sach, su sach, tu cach
day cua » dai cua
cua tre » cua te, cuu tre, cua triet
qua cam » qua cham, qua cac, qua cai
ky tang » ky nang, ky dang, kho tang
te sach » toc sach
qua ca » qua cac, qua cua, qua cai

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 tang van hoa. hieu ((qua cam) OR (qua ca)) thuc dang hanh day cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) ky tang van hoa. hieu ((qua cam) OR (qua ca)) thuc dang hanh day cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (te sach)) ky tang van hoa. hieu ((qua cam) OR (qua ca)) thuc dang hanh day cua tre".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (te sach)) ky tang van hoa. hieu ((qua cam) OR (qua ca)) thuc dang hanh day cua tre*.