Perhaps you should try some spelling variations:
manh hang » manh thang, manh hung, minh hang
chat duc » chat xuc, chat doc, chet duoc
mai khoi » mai khoa, tai khoa, dai khoa
cac khoi » cac thoi, cac khoan, cach thoi
duc manh » suc manh, duc anh, duc minh
tu sach » thu sach, su sach, te sach
tai cuu » tai cuc, tai cua, thai cua
hieu ve » hieu va, hieu van
ve chat » va chat, van chat
sach ky » sac ky, sach y, sach ty
ky lang » ky nang, ky dang, ky tang

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ky lang ((mai khoi) or (cac khoi)). hieu ve chat duc manh hang ((tai cuu) OR (tai buu)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky lang ((mai khoi) OR (cac khoi)). hieu ve chat duc manh hang ((tai cuu) OR (tai buu)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky lang ((mai khoi) or (cac khoi)). hieu ve chat duc manh hang ((tai cuu) OR (tai buu)) tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ky lang ((mai khoi) or (cac khoi)). hieu ve chat duc manh hang ((tai cuu) OR (tai buu)) tre*.