Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuoc sinh
thuat sach » thuat lanh, thuat san
thi nang » thi cong, ki nang, thi hanh
chat xuc » chat huu, cam xuc, chao xu
cau tren » cu tren, dau tren, ca tren
cao hoi » cau hoi, co hoi, cao hoc
hieu va » lieu va, hieu qua
va chat » van chat, va phat, cao chat
va hanh » van hanh, va thanh, va danh
xuc va » duc va, tuc va, luc va
vi cau » va cau, ve cau, di cau

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

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