Perhaps you should try some spelling variations:
thu sach » thuat sach, thuoc sach, thu hoach
danh vai » danh sai, danh va, doanh van
tu sach » su sach, te sach, tu cach
ve cham » va cham, ve chat, vu cham
vai cuu » vai cua
va danh » va dinh, va dan, va hanh
cuu tre » cua tre, cau tren, cau treo
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang
xuc va » duc va, tuc va, luc va
ve cam » ve cac, va cam, ve 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)) ty nang xa hoi. hieu ((ve cam) OR (ve cham)) xuc va danh vai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) ty nang xa hoi. hieu ((ve cam) OR (ve cham)) xuc va danh vai cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (thu sach)) ty nang xa hoi. hieu ((ve cam) OR (ve cham)) xuc va danh vai cuu tre".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thu sach)) ty nang xa hoi. hieu ((ve cam) OR (ve cham)) xuc va danh vai cuu tre*.