Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
van sinh » van minh, va sinh, van dinh
sinh dai » sinh thai, si dai, sinh vat
cua tren » dua tren, ca tren, cua tre
tu sach » thu sach, su sach, te sach
nang ma » tang ma, sang ma, nang cao
dao xuc » dao duc, dao tuc, dao xu
xuc van » duc van, luc van, vuc van
y nang » ky nang, ly nang, v nang
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 y nang ma hoi. hieu van dao xuc van sinh dai cua tren~.
• Adding a wildcard symbol may retrieve word variants: tu sach y nang ma hoi. hieu van dao xuc van sinh dai cua tren*.