Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
thuc dan » thuc hanh, thuc vat
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
ky tang » ky nang, ky dang, kho tang
tang xa » trang xa, tang ma, lang xa
van cuu » van cau, van chu, van cu
hanh le » thanh le, hanh ve, hanh de
le cua » ly 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: tu sach ky tang xa hoi. hieu van cuu ((thuc dan) OR (hoc dan)) hanh le cua te~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky tang xa hoi. hieu van cuu ((thuc dan) OR (hoc dan)) hanh le cua te".
• Adding a wildcard symbol may retrieve word variants: tu sach ky tang xa hoi. hieu van cuu ((thuc dan) OR (hoc dan)) hanh le cua te*.