Perhaps you should try some spelling variations:
cau tren » cu tren, dau tren, ca tren
nang lai » nang tai, mang lai, nang cai
cam luc » cam xuc, cau luc
tai cau » tai cac, tai cao
va danh » va dinh, va dan, dia danh
va hanh » van hanh, va thanh, ban hanh
su sach » vu sach
hieu ve » hieu va, hieu van
lai roi » lai hoi, loi roi
so sach » so sanh, bo sach, co sach
ve cam » ve cham, ve cac, va cam

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

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