Perhaps you should try some spelling variations:
thuat lanh » thuat lap, thuat san
manh minh » manh binh, manh tinh, manh linh
thu sach » tu sach, thuat sach, thuoc sach
va triet » va thiet, va trien, ve triet
hieu ve » hieu va, hieu van
cac duc » cao duc, cac dac, cac nuoc
minh cu » minh cau, dinh cu, minh tu
y nang » ky nang, ly nang, v nang
cu va » cuu va, tu va, su va

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) or (thuat lanh)) y nang x ho. hieu ve ((cac duc) OR (cac du)) manh minh cu va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (thuat lanh)) y nang x ho. hieu ve ((cac duc) OR (cac du)) manh minh cu va triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sach) or (thuat lanh)) y nang x ho. hieu ve ((cac duc) OR (cac du)) manh minh cu va triet".
• Adding a wildcard symbol may retrieve word variants: ((thu sach) or (thuat lanh)) y nang x ho. hieu ve ((cac duc) OR (cac du)) manh minh cu va triet*.