Perhaps you should try some spelling variations:
su sach » so sach, vu sach
lang xa » lang ha, dang xay, lang van
hieu ve » hieu va, hieu van
thuc va » thuc vat, thuc dan, thuc day
cuu tre » cua tre, cau tren, cau treo
ve cam » ve cham, ve cac, va cam
luc va » duc va, tuc va, loc va
vi cuu » vi luu, vinh cuu

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 ((mang may) or (lang xa)) hoi. hieu ve cam ((luc va) or (thuc va)) hanh vi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y ((mang may) OR (lang xa)) hoi. hieu ve cam ((luc va) OR (thuc va)) hanh vi cuu tre.
• Adding a wildcard symbol may retrieve word variants: su sach y ((mang may) or (lang xa)) hoi. hieu ve cam ((luc va) or (thuc va)) hanh vi cuu tre*.