Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
hieu van » hieu va, thien van, lieu va
hai cua » thai cua, dai cua, hoi cua
vai cua » dai cua, lai cua, bai cua
va hanh » van hanh, va thanh, va danh
cam luc » cam xuc, cau luc
van cam » van nam, van lam, van cau
sach ly » sach y, sach lo, sach ty
ly nang » ky nang, ly hang, ly vang
luc va » duc va, tuc va, loc va
o hoi » co hoi, o hoc, o hai
x hoi » xa hoi, x ho, 5 hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuat sach ly nang ((x hoi) or (o hoi)). hieu van cam luc va hanh ((vai cua) OR (hai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat sach ly nang ((x hoi) OR (o hoi)). hieu van cam luc va hanh ((vai cua) OR (hai cua)) tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thuat sach ly nang ((x hoi) or (o hoi)). hieu van cam luc va hanh ((vai cua) OR (hai cua)) tre*".