Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
van tham » van thanh, van tuan, van chat
van cham » van chat, va cham, van pham
sach ty » sach y, sach tu, sach thu
nang xa » nang x, lang xa, nang ma
va dinh » van dinh, va kinh, va tinh
ty nang » ky nang, ty xang, ty hang
dat cua » dai cua, day cua, dan cua
mat cua » ma cua, manh cua, mang cua
tuc va » thuc va, truc va, tuc xa

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 xa hoi. thien ((van cham) or (van tham)) tuc va dinh ((dat cua) OR (mat cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ty nang xa hoi. thien ((van cham) OR (van tham)) tuc va dinh ((dat cua) OR (mat cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach ty nang xa hoi. thien ((van cham) or (van tham)) tuc va dinh ((dat cua) OR (mat cua)) tre".
• Adding a wildcard symbol may retrieve word variants: toc sach ty nang xa hoi. thien ((van cham) or (van tham)) tuc va dinh ((dat cua) OR (mat cua)) tre*.