Perhaps you should try some spelling variations:
doc sach » hoc sach, toc sach, nuoc sach
cham xuc » cam xuc, chat xuc, cham soc
va dinh » van dinh, va kinh, va tinh
ly cong » li cong, ky cong, le cong
cong ha » cong hoa, dong ha, cong tac
hieu va » lieu va, hieu qua
va cham » va chat, va tham
sach ly » sach y, sach lo, sach ty
va hanh » van hanh, va thanh, va danh
de cua » le cua, te cua, dieu cua
di cua » dai cua, doi cua, do cua
ha hoi » hoa hoi, ha noi, xa hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc sach ly cong ha hoi. hieu va cham xuc ((va hanh) or (va dinh)) ((di cua) OR (de cua)) te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc sach ly cong ha hoi. hieu va cham xuc ((va hanh) OR (va dinh)) ((di cua) OR (de cua)) te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc sach ly cong ha hoi. hieu va cham xuc ((va hanh) or (va dinh)) ((di cua) OR (de cua)) te".
• Adding a wildcard symbol may retrieve word variants: doc sach ly cong ha hoi. hieu va cham xuc ((va hanh) or (va dinh)) ((di cua) OR (de cua)) te*.