Perhaps you should try some spelling variations:
thu sach » thuat sach, thuoc sach, thu hoach
va thanh » gia thanh, ban thanh, va tinh
cau tren » cu tren, dau tren, ca tren
cao hoi » cau hoi, co hoi, cao hoc
hieu ve » hieu va, hieu van
va hanh » van hanh, va danh, ban hanh
tu sach » su sach, te sach, tu cach
cac xuc » cam xuc, cac nuoc, chat xuc
ve cac » va cac, vien cac
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: ((thu sach) or (tu sach)) ky nang cao hoi. hieu ve cac xuc ((va hanh) or (va thanh)) vi cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (tu sach)) ky nang cao hoi. hieu ve cac xuc ((va hanh) OR (va thanh)) vi cau tren.
• Adding a wildcard symbol may retrieve word variants: ((thu sach) or (tu sach)) ky nang cao hoi. hieu ve cac xuc ((va hanh) or (va thanh)) vi cau tren*.