Perhaps you should try some spelling variations:
su sach » so sach, vu sach
hanh va » hang va, hanh vi
hieu ve » hieu va, hieu van
cua tre » cua te, cuu tre, cua triet
lang ha » long ha
nang xa » nang x, lang xa, nang ma
luc va » duc va, loc va
tuc va » thuc va, truc va, tuc xa
va cua » va chua, via cua, ca cua
ve cam » ve cham, ve cac, va cam

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 y ((nang xa) or (lang ha)) hoi. hieu ve cam ((luc va) OR (tuc va)) hanh va cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y ((nang xa) OR (lang ha)) hoi. hieu ve cam ((luc va) OR (tuc va)) hanh va cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y ((nang xa) or (lang ha)) hoi. hieu ve cam ((luc va) OR (tuc va)) hanh va cua tre".
• Adding a wildcard symbol may retrieve word variants: su sach y ((nang xa) or (lang ha)) hoi. hieu ve cam ((luc va) OR (tuc va)) hanh va cua tre*.