Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
tham loc » tham nuoc, cham soc, tham hoa
va danh » va dinh, va dan, va hanh
cua tre » cua te, cuu tre, cua triet
hieu va » lieu va, hieu qua
sach ky » sac ky, sach y, sach ty
hau loc » huu loc, phau hoc
danh di » danh du, xanh di, danh dien
cua su » qua su
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: toc sach ky nang x hoi. hieu va ((tham loc) OR (hau loc)) va danh di ((cua tre) or (cua su))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ky nang x hoi. hieu va ((tham loc) OR (hau loc)) va danh di ((cua tre) OR (cua su)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ky nang x hoi. hieu va ((tham loc) OR (hau loc)) va danh di ((cua tre) or (cua su))".
• Adding a wildcard symbol may retrieve word variants: toc sach ky nang x hoi. hieu va ((tham loc) OR (hau loc)) va danh di ((cua tre) or (cua su))*.