Perhaps you should try some spelling variations:
su sach » so sach, vu sach
danh va » doanh va, hanh va, anh va
thuc va » thuc vat, thuc dan, thuc day
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
lang xa » dang xay, lang van
lang ha » long ha
cua tre » cua te, cuu tre, cua triet
sach o » sach lo, sac o, sach y
tuc va » truc va, tuc xa, duc va
va cua » va chua, via cua, ca 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 o ((lang xa) OR (lang ha)) hoi. hieu ve cham ((tuc va) or (thuc va)) danh va cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach o ((lang xa) OR (lang ha)) hoi. hieu ve cham ((tuc va) OR (thuc va)) danh va cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach o ((lang xa) OR (lang ha)) hoi. hieu ve cham ((tuc va) or (thuc va)) danh va cua tre*".