Perhaps you should try some spelling variations:
manh hang » manh thang, manh hung, minh hang
mai khoi » mai khoa, tai khoa, dai khoa
hang tai » hang va, dung tai
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 buu, tai cua
cuu tre » cua tre, cau tren, cau treo
ve bao » te bao, va bao
sach o » sach lo, sac o, sach y
o lang » hoa lang, hoi lang
ve cao » va cao, ve cac, ve co

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