Perhaps you should try some spelling variations:
chay tren » thai tren, ca tren, cau tren
thu sach » tu sach, thuat sach, thuoc sach
hanh lai » hanh tai, thanh lap, thanh loi
hanh lam » thanh lap, hanh kem, hanh va
sach ky » sac ky, sach y, sach ty
thi van » thi lan, thi hanh, thi nang
van cam » van nam, van lam, van cau
xuc van » luc van, vuc van, xuc ban
duc van » duc va, duc tan, duc manh
nang o » nang co, nang ho, nang ro
o hoi » co hoi, o hoc, o hai

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ky nang o hoi. thi van cam ((xuc van) or (duc van)) ((hanh lai) or (hanh lam)) chay tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ky nang o hoi. thi van cam ((xuc van) OR (duc van)) ((hanh lai) OR (hanh lam)) chay tren.
• Adding a wildcard symbol may retrieve word variants: thu sach ky nang o hoi. thi van cam ((xuc van) or (duc van)) ((hanh lai) or (hanh lam)) chay tren*.