Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
van hanh » van thanh, van anh, van ban
ban hanh » ban hang
ty nang » ty xang, ty hang, ly nang
hieu ve » hieu va, hieu van
ve cam » ve cham, ve cac, va cam
vi cua » vai cua, di cua
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: toc sach ((ty nang) OR (ky nang)) xa hoi. hieu ve cam xuc ((van hanh) or (ban hanh)) vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ((ty nang) OR (ky nang)) xa hoi. hieu ve cam xuc ((van hanh) OR (ban hanh)) vi cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ((ty nang) OR (ky nang)) xa hoi. hieu ve cam xuc ((van hanh) or (ban hanh)) vi cua te".
• Adding a wildcard symbol may retrieve word variants: toc sach ((ty nang) OR (ky nang)) xa hoi. hieu ve cam xuc ((van hanh) or (ban hanh)) vi cua te*.