Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
hang san » hoang san, hang ban, hanh san
ban hang » ngan hang
hieu van » hieu va, thien van, lieu va
lam dua » lam duoc, lam dung
san cua » sang cua, ban cua, dan cua
lam cua » nam cua, lam chat
nang ma » tang ma, sang ma, nang cao
te sach » toc sach
cua tre » cua te, cuu tre, cua triet

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((thuat sach) OR (te sach)) ky nang ma hoa. hieu van ((lam dua) OR (lam cua)) ban hang san cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thuat sach) or (te sach)) ky nang ma hoa. hieu van ((lam dua) OR (lam cua)) ban hang san cua tre~".
• Adding a wildcard symbol may retrieve word variants: ((thuat sach) or (te sach)) ky nang ma hoa. hieu van ((lam dua) OR (lam cua)) ban hang san cua tre*.