Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, thieu nien
vien cac » vien bach, vien dai, vien da
cac truc » cau truc, cac tru, cac trung
nang ma » tang ma, sang ma, nang cao
truc va » thuc va, thuc vat, trung va
va hanh » van hanh, va thanh, va danh
vai cua » dai cua, hai cua, lai cua
bach y » sach y
y nang » ky nang, ly nang, v nang
ma hoi » mai hoi, xa hoi, ma hoa
di cua » dai cua, doi cua, de cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu bach y nang ma hoi. hieu vien cac truc va hanh ((((vi cua) or (vai cua))) or (di cua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu bach y nang ma hoi. hieu vien cac truc va hanh ((((vi cua) OR (vai cua))) OR (di cua)) triet.
• Adding a wildcard symbol may retrieve word variants: vu bach y nang ma hoi. hieu vien cac truc va hanh ((((vi cua) or (vai cua))) or (di cua)) triet*.