Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
thu sach » tu sach, thuoc sach, thu hoach
van dinh » van minh, van dich, va dinh
hieu va » lieu va, hieu qua
cam duc » cam xuc, cao duc, pham duc
duc van » duc va, duc tan, duc manh
y nang » ky nang, ly nang, v nang
va cam » va cham, va cac, va cao
x hoi » xa hoi, o hoi, x ho
cu va » cuu va, su va, vu 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 sach)) y nang x hoi. hieu va cam duc van dinh ((cu va) OR (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 cam duc van dinh ((cu va) OR (tu va)) triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sach) or (thuat sach)) y nang x hoi. hieu va cam duc van dinh ((cu va) OR (tu va)) triet".
• Adding a wildcard symbol may retrieve word variants: ((thu sach) or (thuat sach)) y nang x hoi. hieu va cam duc van dinh ((cu va) OR (tu va)) triet*.