Perhaps you should try some spelling variations:
cham xuc » cam xuc, chat xuc, pham duc
van hanh » van thanh, ban hanh, van anh
vu sach » vu bach, su sach, vu khach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, nang ma, mang xa
lang xa » lang ha, dang xay, lang van
hieu vu » hieu va, hieu ve, hieu su
cua tre » cua te, cuu tre, cua triet
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach ky ((nang xa) or (lang xa)) hoi. hieu vu ((cham xuc) OR (cham soc)) van hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ky ((nang xa) OR (lang xa)) hoi. hieu vu ((cham xuc) OR (cham soc)) van hanh vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ky ((nang xa) or (lang xa)) hoi. hieu vu ((cham xuc) OR (cham soc)) van hanh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: vu sach ky ((nang xa) or (lang xa)) hoi. hieu vu ((cham xuc) OR (cham soc)) van hanh vi cua tre*.