Perhaps you should try some spelling variations:
vu khach » vu khanh, vu khac, vay khach
cau tren » cu tren, dau tren, ca tren
ly nang » ly hang, ly vang, ly quang
hieu ve » hieu va, hieu van
va hanh » van hanh, va thanh, va danh
cuu tre » cua tre, cau treo
ve cam » ve cham, ve cac, va cam
xuc va » duc va, tuc va, luc va

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 ((ly nang) or (ky nang)) xa hoi. hieu ve cam xuc va hanh vi ((cuu tre) OR (cau tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu khach ((ly nang) OR (ky nang)) xa hoi. hieu ve cam xuc va hanh vi ((cuu tre) OR (cau tren)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu khach ((ly nang) or (ky nang)) xa hoi. hieu ve cam xuc va hanh vi ((cuu tre) OR (cau tren))".
• Adding a wildcard symbol may retrieve word variants: vu khach ((ly nang) or (ky nang)) xa hoi. hieu ve cam xuc va hanh vi ((cuu tre) OR (cau tren))*.