Perhaps you should try some spelling variations:
hanh di » hanh vi, hanh de, hang di
sach ty » sach y, sach tu, sach thu
va cham » va chat, va tham
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma
cua tre » cua te, cuu tre, cua triet
soc va » hoc va, doc va, goc va
loc va » hoc va, luc va
di cua » dai cua, doi cua, de cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: te ((sach ty) or (sach thieu)) nang xa hoi. hieu va cham ((soc va) OR (loc va)) hanh di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach ty) OR (sach thieu)) nang xa hoi. hieu va cham ((soc va) OR (loc va)) hanh di cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach ty) or (sach thieu)) nang xa hoi. hieu va cham ((soc va) OR (loc va)) hanh di cua tre*".