Perhaps you should try some spelling variations:
thien van » thi van
hieu van » hieu va, lieu va, hieu ve
sach tu » sach thu, cach tu, sach uu
nang xa » nang x, lang xa, nang ma
sach ty » sach y, sach thu, xach tay
lam luc » lao luc, lam duoc
va hanh » van hanh, va thanh, va danh
cuu tre » cua tre, cau tren, cau treo
luc va » duc va, tuc va, loc va
vi cuu » vi luu, vinh cuu

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu ((sach ty) OR (sach tu)) nang xa hoi. ((hieu van) or (thien van)) lam luc va hanh vi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu ((sach ty) OR (sach tu)) nang xa hoi. ((hieu van) OR (thien van)) lam luc va hanh vi cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu ((sach ty) OR (sach tu)) nang xa hoi. ((hieu van) or (thien van)) lam luc va hanh vi cuu tre".
• Adding a wildcard symbol may retrieve word variants: thu ((sach ty) OR (sach tu)) nang xa hoi. ((hieu van) or (thien van)) lam luc va hanh vi cuu tre*.