Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
thien van » thi van
thu sach » tu sach, thuoc sach, thu hoach
va triet » va thiet, va trien, ve triet
hieu va » lieu va, hieu qua
duc van » duc va, duc tan, duc manh
minh tu » minh thu, manh tu, tinh tu
y nang » ky nang, ly nang, v nang
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) or (thuat sach)) y nang x hoi. ((hieu va) or (thien van)) pham duc van minh tu va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (thuat sach)) y nang x hoi. ((hieu va) OR (thien van)) pham duc van minh tu va triet.
• Adding a wildcard symbol may retrieve word variants: ((thu sach) or (thuat sach)) y nang x hoi. ((hieu va) or (thien van)) pham duc van minh tu va triet*.