Perhaps you should try some spelling variations:
thien van » thi van
thuc xay » thuc day, tuc xay, thuat xay
xay hanh » day nhanh, day thanh, xanh hanh
hanh lai » hanh lam, hanh tai, thanh lap
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
ky sang » ky nang, ky dang, ky tang
mai hoi » mai khoi, dai hoi, lai hoi
lai cua » dai cua, hai cua, lai chau
van am » van nam, van lam, van dam
cua te » cua tu

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 sang ((mai hoi) or (xa hoi)). thien van am thuc xay hanh lai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky sang ((mai hoi) OR (xa hoi)). thien van am thuc xay hanh lai cua te.
• Adding a wildcard symbol may retrieve word variants: tu sach ky sang ((mai hoi) or (xa hoi)). thien van am thuc xay hanh lai cua te*.