Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc cac, hoc anh
thai cua » than cua, tai cuc, dai cua
tu sach » thu sach, su sach, te sach
nang xa » nang x, lang xa, nang ma
xa nhan » ca nhan, va nhan, xa phan
va cam » va cham, va cac, va cao
xuc xa » tuc xa, buc xa

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 (hoc sach)) ky nang xa hoi. lieu va cam xuc xa nhan ((thai cua) OR (tri cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (hoc sach)) ky nang xa hoi. lieu va cam xuc xa nhan ((thai cua) OR (tri cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (hoc sach)) ky nang xa hoi. lieu va cam xuc xa nhan ((thai cua) OR (tri cua)) tre".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (hoc sach)) ky nang xa hoi. lieu va cam xuc xa nhan ((thai cua) OR (tri cua)) tre*.