Perhaps you should try some spelling variations:
cau tren » cu tren, dau tren, ca tren
cham luc » cham soc, nhan luc, cham cuu
thanh ve » hanh ve, thanh vien, thanh van
thanh va » thanh van, thanh ha, thanh hoa
hieu va » lieu va, hieu qua
va cham » va chat, va tham
tang xa » trang xa, tang ma, lang xa
ky tang » ky nang, ky dang, kho tang
hanh va » hang va, hanh vi
luc va » duc va, tuc va, loc va
san ky » sang ky, van ky, dan ky
tu san » thu san, tu ban, tu can

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu san ky tang xa hoi. hieu va cham luc va ((((thanh va) OR (thanh ve))) or (hanh va)) cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu san ky tang xa hoi. hieu va cham luc va ((((thanh va) OR (thanh ve))) OR (hanh va)) cau tren.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu san ky tang xa hoi. hieu va cham luc va ((((thanh va) OR (thanh ve))) or (hanh va)) cau tren".
• Adding a wildcard symbol may retrieve word variants: tu san ky tang xa hoi. hieu va cham luc va ((((thanh va) OR (thanh ve))) or (hanh va)) cau tren*.