Perhaps you should try some spelling variations:
vien cac » vien bach, vien dai, vien da
tu sach » thu sach, su sach, te sach
va hanh » van hanh, va thanh, va danh
ly nang » ky nang, ly hang, ly vang
nang xa » nang x, lang xa, nang ma
doi cua » hoi cua
sach ly » sach y, sach lo, sach ty
xuc va » duc va, tuc va, luc va
ve cac » va cac

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 ly nang xa hoi. hieu ((ve cac) OR (vien cac)) xuc va hanh ((doi cua) or (dai cua)) te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ly nang xa hoi. hieu ((ve cac) OR (vien cac)) xuc va hanh ((doi cua) OR (dai cua)) te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ly nang xa hoi. hieu ((ve cac) OR (vien cac)) xuc va hanh ((doi cua) or (dai cua)) te".
• Adding a wildcard symbol may retrieve word variants: tu sach ly nang xa hoi. hieu ((ve cac) OR (vien cac)) xuc va hanh ((doi cua) or (dai cua)) te*.