Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
dinh lam » dinh van, tinh lao
thuc va » thuc vat, thuc dan, thuc day
lam cua » nam cua, lam chat
hieu ve » hieu va, hieu van
ve cam » ve cham, ve cac, va cam
tuc va » truc va, tuc xa, duc va
cua te » cua tu
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((te sach) OR (toc sach)) ky nang x hoi. hieu ve cam ((tuc va) or (thuc va)) dinh lam cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (toc sach)) ky nang x hoi. hieu ve cam ((tuc va) OR (thuc va)) dinh lam cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) OR (toc sach)) ky nang x hoi. hieu ve cam ((tuc va) or (thuc va)) dinh lam cua te".
• Adding a wildcard symbol may retrieve word variants: ((te sach) OR (toc sach)) ky nang x hoi. hieu ve cam ((tuc va) or (thuc va)) dinh lam cua te*.