Perhaps you should try some spelling variations:
cau tren » cu tren, dau tren, ca tren
vu sach » vu bach, su sach, vu khach
sach ky » sac ky, sach y, sach ty
cao hoi » cau hoi, co hoi, cao hoc
hieu ve » hieu va, hieu van
cac xuc » cam xuc, cac nuoc, chat xuc
va hanh » van hanh, va thanh, ban hanh
va danh » va dinh, va dan, dia danh
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: vu sach ky nang cao hoi. hieu ve cac xuc ((va hanh) or (va danh)) vi cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ky nang cao hoi. hieu ve cac xuc ((va hanh) OR (va danh)) vi cau tren.
• Adding a wildcard symbol may retrieve word variants: vu sach ky nang cao hoi. hieu ve cac xuc ((va hanh) or (va danh)) vi cau tren*.