Perhaps you should try some spelling variations:
chay tren » thai tren, ca tren, cau tren
thanh lap » thanh san, phan lap, thanh hai
lap chay » lam chay, san chay, la thay
luoc can » luc canh, hoc can, luoc dai
luc van » luoc van, luu van, duc van
tu sach » thu sach, su sach, te sach
hieu ve » hieu va, hieu van
ty nang » ky nang, ty hang, ly nang
ve cau » ke cau, va cau, ve cac
x hoi » xa hoi, o hoi, x ho

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 ((ty nang) or (ty xang)) x hoi. hieu ve cau ((luoc can) or (luc van)) thanh lap chay tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ty nang) OR (ty xang)) x hoi. hieu ve cau ((luoc can) OR (luc van)) thanh lap chay tren.
• Adding a wildcard symbol may retrieve word variants: tu sach ((ty nang) or (ty xang)) x hoi. hieu ve cau ((luoc can) or (luc van)) thanh lap chay tren*.