Perhaps you should try some spelling variations:
trinh ve » trinh he, trinh va, trinh vi
va trinh » van trinh, va tinh, lap trinh
hieu van » hieu va, thien van, lieu va
sach ky » sac ky, sach y, sach kem
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu va
nang xa » nang x, lang xa, nang ma
sach ty » sach y, sach tu, sach thu
xuc va » duc va, tuc va, luc va
ve cua » le cua, de cua, te cua

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

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