Perhaps you should try some spelling variations:
nhanh hai » nhanh thai, thanh hai, nhanh ha
thu sach » tu sach, thuat sach, thuoc sach
duc minh » duc anh
cau tren » cu tren, dau tren, cau treo
duc manh » suc manh, duc anh, duc tan
ca tren » cu tren, la tren, co tren
hieu ve » hieu va, hieu van
y nang » ky nang, ly nang, v nang
ve cam » ve cham, ve cac, va cam
x hoi » xa hoi, o hoi, x ho

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 y nang x hoi. hieu ve cam ((duc manh) OR (duc minh)) nhanh hai ((cau tren) or (ca tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach y nang x hoi. hieu ve cam ((duc manh) OR (duc minh)) nhanh hai ((cau tren) OR (ca tren)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu sach y nang x hoi. hieu ve cam ((duc manh) OR (duc minh)) nhanh hai ((cau tren) or (ca tren))".
• Adding a wildcard symbol may retrieve word variants: thu sach y nang x hoi. hieu ve cam ((duc manh) OR (duc minh)) nhanh hai ((cau tren) or (ca tren))*.