Perhaps you should try some spelling variations:
so sach » so sanh, bo sach, co sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
cao hoc » co hoc, cho hoc, chat hoc
xuc anh » duc anh, luc canh, suc manh
ve cam » ve cham, ve cac, ve cai
va cam » va cham, va cac, va cao
vi cua » vai cua, di cua

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: so sach ty nang cao hoc. hieu ((ve cam) OR (va cam)) xuc anh tuan ((vi cua) or (dai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ty nang cao hoc. hieu ((ve cam) OR (va cam)) xuc anh tuan ((vi cua) OR (dai cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ty nang cao hoc. hieu ((ve cam) OR (va cam)) xuc anh tuan ((vi cua) or (dai cua)) tre".
• Adding a wildcard symbol may retrieve word variants: so sach ty nang cao hoc. hieu ((ve cam) OR (va cam)) xuc anh tuan ((vi cua) or (dai cua)) tre*.