Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, thieu nien
vien cac » vien bach, vien dai, vien da
duc manh » suc manh, duc anh, duc minh
thu dan » thuc dan, thu dang, thu ban
duc van » duc va, duc tan, duc phan
dan ky » van ky
de cua » te cua, dieu cua
le cua » ly cua
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu dan ky nang x hoi. hieu vien cac ((duc van) or (duc manh)) hanh ((de cua) OR (le cua)) cu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu dan ky nang x hoi. hieu vien cac ((duc van) OR (duc manh)) hanh ((de cua) OR (le cua)) cu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu dan ky nang x hoi. hieu vien cac ((duc van) or (duc manh)) hanh ((de cua) OR (le cua)) cu".
• Adding a wildcard symbol may retrieve word variants: thu dan ky nang x hoi. hieu vien cac ((duc van) or (duc manh)) hanh ((de cua) OR (le cua)) cu*.