Perhaps you should try some spelling variations:
lang hai » lang chai, lang thai, lang ha
hanh tai » thanh tai, hang tai, han tai
van hanh » van thanh, ban hanh, van anh
tu sach » thu sach, su sach, te sach
va cham » va chat, va tham
tai cuu » tai cuc, tai buu, tai cua
luc van » luoc van, luu van, duc van
cuu tre » cua tre, cau tren, cau treo
sach ky » sac ky, sach y, sach ty
ve cham » ve chat, vu cham, ve chim
hai hoi » dai hoi, hai moi, hai hai
ky lang » ky nang, ky dang, ky tang
va cam » va cac, va cao, va cai

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 lang hai hoi. hieu ((ve cham) or (((va cam) or (va cham)))) luc van hanh tai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky lang hai hoi. hieu ((ve cham) OR (((va cam) OR (va cham)))) luc van hanh tai cuu tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ky lang hai hoi. hieu ((ve cham) or (((va cam) or (va cham)))) luc van hanh tai cuu tre*.