Perhaps you should try some spelling variations:
gay thoi » may thoi, tay thoi, ngay tuoi
te sach » toc sach
sach ky » sac ky, sach y, sach ty
hieu le » hieu ve, hieu he, hieu ly
ky dang » ky nang, ky danh
tay hoi » tay ho, tao hoi, tay thai
anh va » hanh va
va cua » va chua, via cua, ca cua
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: te sach ky dang ((gay thoi) or (tay hoi)). hieu le ((cap nuoc) OR (dat nuoc)) tuan anh va cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky dang ((gay thoi) OR (tay hoi)). hieu le ((cap nuoc) OR (dat nuoc)) tuan anh va cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky dang ((gay thoi) or (tay hoi)). hieu le ((cap nuoc) OR (dat nuoc)) tuan anh va cua te".
• Adding a wildcard symbol may retrieve word variants: te sach ky dang ((gay thoi) or (tay hoi)). hieu le ((cap nuoc) OR (dat nuoc)) tuan anh va cua te*.