Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
van hanh » van thanh, ban hanh, van anh
chat xuc » chat huu, chao xu, chat cua
nang mai » nang ma, nang tai, lang mai
te sach » toc sach
hieu va » lieu va, hieu qua
mai hoi » mai khoi, dai hoi, lai hoi
ty nang » ky nang, ty xang, ty hang
vi cua » vai cua, di cua
cua cu » cua chu, cua cau, cua su

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((te sach) or (thuoc sach)) ty nang mai hoi. hieu va ((chat xuc) or (cam xuc)) van hanh vi cua cu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (thuoc sach)) ty nang mai hoi. hieu va ((chat xuc) OR (cam xuc)) van hanh vi cua cu.
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (thuoc sach)) ty nang mai hoi. hieu va ((chat xuc) or (cam xuc)) van hanh vi cua cu*.