Perhaps you should try some spelling variations:
thu sach » thuat sach, thuoc sach, thu hoach
hanh vai » hanh vi, hanh va, hanh tai
van hanh » van thanh, ban hanh, van anh
tu sach » su sach, te sach, tu cach
va cham » va chat, va tham
vai cuu » vai cua
tuc van » thuc van, truc van, tuc va
cuu tre » cua tre, cau tren, cau treo
nang xa » nang x, lang xa, nang ma
va cam » va cac, va cao, va cai

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)) ky nang xa hoi. hieu ((va cam) or (va cham)) tuc van hanh vai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) ky nang xa hoi. hieu ((va cam) OR (va cham)) tuc van hanh vai cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (thu sach)) ky nang xa hoi. hieu ((va cam) or (va cham)) tuc van hanh vai cuu tre".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (thu sach)) ky nang xa hoi. hieu ((va cam) or (va cham)) tuc van hanh vai cuu tre*.