Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
va thanh » gia thanh, ban thanh, va tinh
vang cua » mang cua, hang cua, tang cua
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
nam duc » nam duoc, pham duc, nam thuc
dan cua » dan ca, ban cua, dai cua
x hoi » xa hoi, o hoi, x ho

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 ty nang x hoi. hieu van nam duc va thanh ((dan cua) or (vang cua)) te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty nang x hoi. hieu van nam duc va thanh ((dan cua) OR (vang cua)) te.
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang x hoi. hieu van nam duc va thanh ((dan cua) or (vang cua)) te*.