Perhaps you should try some spelling variations:
vai cua » dai cua, hai cua, lai cua
va hanh » van hanh, va thanh, va danh
cam tuc » cam xuc, cam tu, nam thuc
hieu va » lieu va, hieu qua
hoa hoi » khoa hoi, hoa hoc, hoa doi
sai ky » sac ky
va cam » va cham, va cac, va cao
tuc va » thuc va, truc va, tuc xa
ha hoi » ha noi, xa hoi, va hoi
vi cua » di cua
su sai » su tai, su hai, su dai

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sai ky nang ((ha hoi) or (hoa hoi)). hieu va cam tuc va hanh ((vi cua) OR (vai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sai ky nang ((ha hoi) OR (hoa hoi)). hieu va cam tuc va hanh ((vi cua) OR (vai cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sai ky nang ((ha hoi) or (hoa hoi)). hieu va cam tuc va hanh ((vi cua) OR (vai cua)) tre".
• Adding a wildcard symbol may retrieve word variants: su sai ky nang ((ha hoi) or (hoa hoi)). hieu va cam tuc va hanh ((vi cua) OR (vai cua)) tre*.