Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
ty nang » ky nang, ty xang, ty hang
nang ma » tang ma, sang ma, nang cao
via cua » gia cua, gian cua, giau cua
anh via » anh va, anh bia, anh viet
sach ty » sach y, sach tu, sach thu
do van » dao van, so van
cua te » cua tu
ve cac » vien cac
ma hoi » mai hoi, xa hoi, ma hoa

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: tu sach ty nang ma hoi. hieu ((ve cac) OR (va cac)) ((do van) OR (vo van)) anh via cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty nang ma hoi. hieu ((ve cac) OR (va cac)) ((do van) or (vo van)) anh via cua te~".
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang ma hoi. hieu ((ve cac) OR (va cac)) ((do van) or (vo van)) anh via cua te*.