Perhaps you should try some spelling variations:
vu sach » vu bach, su sach, vu khach
ky lang » ky dang, ky tang, tay lang
hieu ke » hieu kem, chieu ke, hieu ky
cau loc » hau loc, cau hoc, cau luc
va tinh » may tinh
va chua » vua chua, ca chua, va chu
ke cau » ket cau
loc va » hoc va, luc va
va cua » via cua, ca cua, ma 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 sach ((ky lang) or (ky nang)) xa hoi. hieu ke cau loc va tinh ((va cua) or (va chua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ((ky lang) OR (ky nang)) xa hoi. hieu ke cau loc va tinh ((va cua) OR (va chua)) tre.
• Adding a wildcard symbol may retrieve word variants: vu sach ((ky lang) or (ky nang)) xa hoi. hieu ke cau loc va tinh ((va cua) or (va chua)) tre*.