Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
va thanh » ban thanh, va tinh, le thanh
ban hanh » ban hang
hieu ve » hieu va, hieu van
cam duc » cam xuc, cao duc, pham duc
nang ma » tang ma, sang ma, nang cao
hai cua » thai cua, dai cua, hoi cua
ve cam » ve cham, ve cac, va cam
y nang » ky nang, ly nang, v nang
ma hoi » mai hoi, xa hoi, ma hoa
cua tu » cua tuc, cua su, cua cu

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach y nang ma hoi. hieu ve cam duc ((ban hanh) or (((va thanh) OR (gia thanh)))) hai cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach y nang ma hoi. hieu ve cam duc ((ban hanh) OR (((va thanh) OR (gia thanh)))) hai cua tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach y nang ma hoi. hieu ve cam duc ((ban hanh) or (((va thanh) OR (gia thanh)))) hai cua tu".
• Adding a wildcard symbol may retrieve word variants: toc sach y nang ma hoi. hieu ve cam duc ((ban hanh) or (((va thanh) OR (gia thanh)))) hai cua tu*.