Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
xang cao » nang cao, lang cao, quang cao
van hanh » ban hanh, van anh, van ban
vu sach » vu bach, su sach, vu khach
sach ty » sach y, sach tu, sach thu
cao hoi » cau hoi, co hoi, cao hoc
qua cam » qua cham, qua cac, qua ca
cua tre » cuu tre, cua triet, dua tren
cua te » cua tu

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

• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ty xang cao hoi. hieu qua cam xuc ((van hanh) OR (van thanh)) di ((cua tre) OR (cua te))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ty xang cao hoi. hieu qua cam xuc ((van hanh) or (van thanh)) di ((cua tre) OR (cua te))~".
• Adding a wildcard symbol may retrieve word variants: vu sach ty xang cao hoi. hieu qua cam xuc ((van hanh) or (van thanh)) di ((cua tre) OR (cua te))*.