Perhaps you should try some spelling variations:
cham xuc » cam xuc, chat xuc, cham soc
va cham » va chat, va tham
va danh » va dinh, va dan, dia danh
va hanh » van hanh, va thanh, ban hanh
sach ky » sac ky, sach ty, sach kem
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma
su viet » so viet
vi su » va su, ve su, ki su

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 ky) or (sach y)) nang xa hoi. hieu va cham xuc ((va hanh) OR (va danh)) vi su viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach ky) OR (sach y)) nang xa hoi. hieu va cham xuc ((va hanh) OR (va danh)) vi su viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach ky) or (sach y)) nang xa hoi. hieu va cham xuc ((va hanh) OR (va danh)) vi su viet".
• Adding a wildcard symbol may retrieve word variants: su ((sach ky) or (sach y)) nang xa hoi. hieu va cham xuc ((va hanh) OR (va danh)) vi su viet*.