Perhaps you should try some spelling variations:
vu khach » vu khanh, vay khach, cua khach
va trien » va truyen, va thiet, va tuyen
vu khac » vu kham, vu khanh, bui khac
hieu ve » hieu va, hieu van
truc va » thuc va, thuc vat, trung va
hanh ve » hanh vi, hanh kem
hanh va » hang va, hanh vi
y nang » ky nang, ly nang, v nang
ve cau » ke cau, va cau, ve cac
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: ((vu khach) OR (vu khac)) y nang x hoi. hieu ve cau truc va ((hanh ve) or (hanh va)) va trien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu khach) OR (vu khac)) y nang x hoi. hieu ve cau truc va ((hanh ve) OR (hanh va)) va trien.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((vu khach) OR (vu khac)) y nang x hoi. hieu ve cau truc va ((hanh ve) or (hanh va)) va trien".
• Adding a wildcard symbol may retrieve word variants: ((vu khach) OR (vu khac)) y nang x hoi. hieu ve cau truc va ((hanh ve) or (hanh va)) va trien*.