Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, hieu ve
tu sach » thu sach, su sach, te sach
nang xa » nang x, lang xa, nang ma
cau luc » cau truc, cau phuc
va danh » va dinh, va dan, va hanh
y nang » ky nang, ly nang, v nang
luc va » duc va, tuc va, loc va
den su » dan su, nen su
ve su » va su

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

• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang xa hoi. ((hieu van) OR (lieu va)) cau luc va danh ((den su) OR (ve su)) triet~.
• Adding a wildcard symbol may retrieve word variants: tu sach y nang xa hoi. ((hieu van) or (lieu va)) cau luc va danh ((den su) or (ve su)) triet*.