Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
tu sach » thu sach, su sach, te sach
van cau » van dau, van hau, van chat
xa hanh » xa thanh, xa khanh, va hanh
y nang » ky nang, ly nang, may nang
v nang » va nang, vu nang, van nang
cau tu » dau tu, cau truc
vi cua » vai cua, di cua
cua tu » cua tuc, cua su, cua cu
tu xa » tu xay, tu va, te xa

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ((y nang) or (v nang)) xa hoi. hieu van cau tu xa hanh vi cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((y nang) OR (v nang)) xa hoi. hieu van cau tu xa hanh vi cua tu.
• Adding a wildcard symbol may retrieve word variants: tu sach ((y nang) or (v nang)) xa hoi. hieu van cau tu xa hanh vi cua tu*.