Perhaps you should try some spelling variations:
thu sac » thu sach, thu xac, thu dac
va hanh » van hanh, va thanh, va danh
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
thu san » thuy san, thu ban, phu san
cac lo » cac lop, cac co, cac bo
va cua » va chua, via cua, ma cua
ca cua » co cua
ve cac » va cac, vien cac
lo va » lo van, lao va, ly va

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((thu sac) or (thu san)) ky nang xa hoi. hieu ve cac lo va hanh ((va cua) OR (ca cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sac) OR (thu san)) ky nang xa hoi. hieu ve cac lo va hanh ((va cua) OR (ca cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sac) or (thu san)) ky nang xa hoi. hieu ve cac lo va hanh ((va cua) OR (ca cua)) tre".
• Adding a wildcard symbol may retrieve word variants: ((thu sac) or (thu san)) ky nang xa hoi. hieu ve cac lo va hanh ((va cua) OR (ca cua)) tre*.