Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
thai cua » than cua, tai cuc, tri cua
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma
van cam » van nam, van lam, van cau
duc ban » duc tan, duc van, dua ban
hai cua » dai cua, hoi cua, lai cua
y nang » ky nang, ly nang, v nang

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 y nang xa hoi. hieu van cam ((duc ban) or (duc va)) thanh ((hai cua) OR (thai cua)) te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang xa hoi. hieu van cam ((duc ban) OR (duc va)) thanh ((hai cua) OR (thai cua)) te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach y nang xa hoi. hieu van cam ((duc ban) or (duc va)) thanh ((hai cua) OR (thai cua)) te".
• Adding a wildcard symbol may retrieve word variants: su sach y nang xa hoi. hieu van cam ((duc ban) or (duc va)) thanh ((hai cua) OR (thai cua)) te*.