Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
sach thi » sach thu, sach tai, sach thieu
thi nang » thi cong, ki nang, thi hanh
hieu van » hieu va, thien van, lieu va
lam truc » lam truoc, nam truc, lam thuoc
nang xa » nang x, lang xa, nang ma
van lam » van nam
truc va » thuc va, thuc vat, trung va
va danh » va dinh, va dan, va hanh
vai cua » dai cua, lai cua, bai cua
hai cua » thai cua, dai cua, hoi cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuoc sach thi nang xa hoi. hieu van lam truc va danh ((vai cua) or (hai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuoc sach thi nang xa hoi. hieu van lam truc va danh ((vai cua) OR (hai cua)) tre.
• Adding a wildcard symbol may retrieve word variants: thuoc sach thi nang xa hoi. hieu van lam truc va danh ((vai cua) or (hai cua)) tre*.