Perhaps you should try some spelling variations:
thu sach » thuat sach, thuoc sach, thu hoach
tu sach » su sach, te sach, tu cach
va hanh » van hanh, va thanh, va danh
ty nang » ky nang, ty xang, ty hang
ve cam » ve cham, ve cac, ve cai
va cam » va cham, va cac, va cao
vi cua » vai cua, di cua
cua te » cua tu
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: ((tu sach) OR (thu sach)) ty nang x hoi. hieu ((ve cam) or (va cam)) duc va hanh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) ty nang x hoi. hieu ((ve cam) OR (va cam)) duc va hanh vi cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (thu sach)) ty nang x hoi. hieu ((ve cam) or (va cam)) duc va hanh vi cua te".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (thu sach)) ty nang x hoi. hieu ((ve cam) or (va cam)) duc va hanh vi cua te*.