Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
tinh van » trinh van, dinh van, tinh va
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
chu tre » chu tri, cuu tre, cau tren
cho tre » cho thue, khoe tre
y nang » ky nang, ly nang, v nang
va cam » va cham, va cac, va cao
xuc va » tuc va, luc va, xac va

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach y nang xa hoi. hieu va cam ((xuc va) or (duc va)) tinh van ((chu tre) or (cho tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach y nang xa hoi. hieu va cam ((xuc va) OR (duc va)) tinh van ((chu tre) OR (cho tre)).
• Adding a wildcard symbol may retrieve word variants: thu sach y nang xa hoi. hieu va cam ((xuc va) or (duc va)) tinh van ((chu tre) or (cho tre))*.