Perhaps you should try some spelling variations:
hanh tai » thanh tai, hang tai, han tai
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
tai duc » tai cuc, mai duc, tai du
ve cham » va cham, ve chat, vu cham
duc tre » duoc tren, duc tien
sang ma » tang ma, nang ma, sang tao
ky sang » ky nang, ky dang, ky tang
ve cam » ve cac, va cam, ve cai
luc va » tuc va, loc va
ma hoi » mai hoi, xa hoi, ma hoa

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