Perhaps you should try some spelling variations:
thanh dai » thanh hai, thanh tai, thanh dat
va thanh » gia thanh, ban thanh, va tinh
mai hoi » mai khoi, dai hoi, lai hoi
sach ty » sach y, sach tu, sach thu
hieu ve » hieu va, hieu van
cam tuc » cam xuc, cam tu, nam thuc
ty nang » ky nang, ty xang, ty hang
su sach » so sach, vu sach
ma hoi » xa hoi, ma hoa, me hoi

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ty nang ((ma hoi) or (mai hoi)). hieu ve ((cam tuc) or (am thuc)) va thanh dai cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty nang ((ma hoi) OR (mai hoi)). hieu ve ((cam tuc) OR (am thuc)) va thanh dai cua vat.
• Adding a wildcard symbol may retrieve word variants: su sach ty nang ((ma hoi) or (mai hoi)). hieu ve ((cam tuc) or (am thuc)) va thanh dai cua vat*.