Perhaps you should try some spelling variations:
truc va » thuc va, thuc vat, trung va
va cham » va chat, va tham
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma
sach va » sach xa, sach ha, sach dao
luu tre » luu tru, cuu tre, luy tre
sach v » sach y, sach 2, sach vay
vi luu » vi lua

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 v) or (sach va)) nang xa hoi. hieu va cham ((duc va) or (truc va)) hanh vi luu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach v) OR (sach va)) nang xa hoi. hieu va cham ((duc va) OR (truc va)) hanh vi luu tre.
• Adding a wildcard symbol may retrieve word variants: su ((sach v) or (sach va)) nang xa hoi. hieu va cham ((duc va) or (truc va)) hanh vi luu tre*.