Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
toc sach » hoc sach, doc sach, nuoc sach
ban hanh » ban hang
ty ngang » ly ngan, te ngan, tu ngan
ngang co » ngang cho, nang co, nganh co
hanh di » hanh vi, hanh de, hang di
hieu va » lieu va, hieu qua
cac xuc » cac nuoc, chat xuc, cac cuoc
cua cau » cua cac, cua chu, cua cay
di cua » dai cua, doi cua, de cua

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) OR (thuoc sach)) ty ngang co hoc. hieu va ((cac xuc) or (cam xuc)) ban hanh di cua cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc sach) OR (thuoc sach)) ty ngang co hoc. hieu va ((cac xuc) OR (cam xuc)) ban hanh di cua cau*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((toc sach) OR (thuoc sach)) ty ngang co hoc. hieu va ((cac xuc) or (cam xuc)) ban hanh di cua cau*".