Perhaps you should try some spelling variations:
hanh cong » thanh cong, hang cong, hanh dong
van hanh » van thanh, ban hanh, van anh
tu sach » thu sach, su sach, te sach
xuc van » duc van, luc van, vuc van
cac xuc » cam xuc, cac nuoc, chat xuc
hieu va » lieu va, hieu qua
sach ky » sac ky, sach y, sach ty
mang xa » lang xa, mang may, dang xay
cua tre » cua te, cuu tre, cua triet
cu tre » cu tren, cuu tre, cu tri

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 ((mang xa) or (nang x)) hoi. hieu va cac xuc van hanh cong ((cu tre) or (cua tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky ((mang xa) OR (nang x)) hoi. hieu va cac xuc van hanh cong ((cu tre) OR (cua tre)).
• Adding a wildcard symbol may retrieve word variants: tu sach ky ((mang xa) or (nang x)) hoi. hieu va cac xuc van hanh cong ((cu tre) or (cua tre))*.