Perhaps you should try some spelling variations:
thien hach » thien thanh, hien hanh
hien bach » vien bach, hien hanh, dien sach
van hang » van khang, van hoang, van thang
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
xuc van » duc van, luc van, vuc van
cau tre » cau tren, cau treo, cau tra
va cau » van cau, va cac, va dau

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 ky nang xa hoi. bieu ((hien bach) or (thien hach)) xuc van hang va cau tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang xa hoi. bieu ((hien bach) OR (thien hach)) xuc van hang va cau tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang xa hoi. bieu ((hien bach) or (thien hach)) xuc van hang va cau tre*.