Perhaps you should try some spelling variations:
tinh ven » trinh ven, tinh yen, sinh vien
cua tre » cua te, cuu tre, cua triet
tinh ve » trinh ve, dinh ve, tinh va
hieu va » lieu va, hieu qua
cac xuc » cam xuc, cac nuoc, chat xuc
mang xa » lang xa, mang may, dang xay
sac ky » cac ky, sai ky
xuc va » duc va, tuc va, luc va
te sac » te sach, te cac, te san

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sac ky ((mang xa) or (nang x)) hoi. hieu va cac xuc va ((tinh ve) OR (tinh ven)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky ((mang xa) OR (nang x)) hoi. hieu va cac xuc va ((tinh ve) OR (tinh ven)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sac ky ((mang xa) or (nang x)) hoi. hieu va cac xuc va ((tinh ve) OR (tinh ven)) cua tre".
• Adding a wildcard symbol may retrieve word variants: te sac ky ((mang xa) or (nang x)) hoi. hieu va cac xuc va ((tinh ve) OR (tinh ven)) cua tre*.