Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
su sach » so sach, vu sach
vu lang » va lang, vu dang, cu lang
lang xa » lang ha, dang xay, lang van
hieu ve » hieu va, hieu van
cuu tre » cua tre, cau tren, cau treo
ve cau » ke cau, va cau, ve cac
luc 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) or (thuat sach)) vu lang xa hoi. hieu ve cau ((luc va) or (duc va)) hanh vi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (thuat sach)) vu lang xa hoi. hieu ve cau ((luc va) OR (duc va)) hanh vi cuu tre.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (thuat sach)) vu lang xa hoi. hieu ve cau ((luc va) or (duc va)) hanh vi cuu tre*.