Perhaps you should try some spelling variations:
tu cach » tu cac
va hanh » van hanh, va thanh, ban hanh
va danh » va dinh, va dan, dia danh
hieu ve » hieu va, hieu van
ca tren » cau tren, cu tren, la tren
su sach » so sach, vu sach
ve cam » ve cham, ve cac, va cam
x hoi » xa hoi, o hoi, x ho
va ca » va cac, va cao, va cai

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu cach) or (su sach)) ky nang x hoi. hieu ve cam xuc ((va danh) OR (va hanh)) va ca tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cach) OR (su sach)) ky nang x hoi. hieu ve cam xuc ((va danh) OR (va hanh)) va ca tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu cach) or (su sach)) ky nang x hoi. hieu ve cam xuc ((va danh) OR (va hanh)) va ca tren".
• Adding a wildcard symbol may retrieve word variants: ((tu cach) or (su sach)) ky nang x hoi. hieu ve cam xuc ((va danh) OR (va hanh)) va ca tren*.