Perhaps you should try some spelling variations:
thi nang » thi cong, ki nang, thi hanh
thai cua » than cua, tai cuc, tri cua
hai cua » dai cua, hoi cua, lai cua
va hanh » van hanh, va thanh, va danh
cau loc » hau loc, cau hoc, cau luc
hieu ve » hieu va, hieu van
xac hoi » xa hoi, cac thoi, cac khoi
sac ly » sac ky
loc va » hoc va, luc va
va xac » va cac
tu sac » tu sach, tu cac, tu san

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

• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ly va xac hoi. ((hieu ve) OR (thi nang)) cau loc va hanh ((hai cua) OR (thai cua)) tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ly va xac hoi. ((hieu ve) or (thi nang)) cau loc va hanh ((hai cua) OR (thai cua)) tre~".
• Adding a wildcard symbol may retrieve word variants: tu sac ly va xac hoi. ((hieu ve) or (thi nang)) cau loc va hanh ((hai cua) OR (thai cua)) tre*.