Perhaps you should try some spelling variations:
vu sach » vu bach, su sach, vu khach
va hanh » van hanh, va thanh, ban hanh
ky sang » ky nang, ky dang, duy sang
vai cua » dai cua, hai cua, lai cua
ky tang » ky nang, ky dang, kho tang
lay lai » lay thai
hieu ve » hieu va, hieu van
cam tuc » cam xuc, cam tu, nam thuc
va danh » va dinh, va dan, dia danh
ve cam » ve cham, ve cac, va cam
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach ((ky sang) or (ky tang)) lay lai. hieu ve cam tuc ((va danh) OR (va hanh)) vai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ((ky sang) OR (ky tang)) lay lai. hieu ve cam tuc ((va danh) OR (va hanh)) vai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ((ky sang) or (ky tang)) lay lai. hieu ve cam tuc ((va danh) OR (va hanh)) vai cua te".
• Adding a wildcard symbol may retrieve word variants: vu sach ((ky sang) or (ky tang)) lay lai. hieu ve cam tuc ((va danh) OR (va hanh)) vai cua te*.