Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
sach ky » sac ky, sach y, sach ty
hang di » hang doi, hang vi, hang dien
hanh de » hanh ve, hanh kem
su viet » so viet
xuc va » duc va, luc va, xac va
tuc va » thuc va, truc va, tuc xa
va cam » va cham, va cac, va cao
nang o » nang co, nang ho, nang ro
o hoi » co hoi, o hoc, o hai

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuat sach ky nang o hoi. lieu va cam ((xuc va) OR (tuc va)) ((hanh de) or (hang di)) su viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach ky nang o hoi. lieu va cam ((xuc va) OR (tuc va)) ((hanh de) OR (hang di)) su viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat sach ky nang o hoi. lieu va cam ((xuc va) OR (tuc va)) ((hanh de) or (hang di)) su viet".
• Adding a wildcard symbol may retrieve word variants: thuat sach ky nang o hoi. lieu va cam ((xuc va) OR (tuc va)) ((hanh de) or (hang di)) su viet*.