Perhaps you should try some spelling variations:
chieu thien » chieu chien, hieu hien
thien hach » thien thanh, hien hanh
thanh va » thanh van, hanh va, thanh ha
tu sach » thu sach, su sach, te sach
huu tre » huu tri, cuu tre, huu them
y nang » ky nang, ly nang, v nang
nang o » nang co, nang ho, nang ro
luc va » duc va, loc va
tuc va » thuc va, truc va, tuc xa
va huu » vu huu
o hoi » co hoi, o hoc, o hai

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach y nang o hoi. chieu thien hach ((luc va) or (tuc va)) thanh va huu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang o hoi. chieu thien hach ((luc va) OR (tuc va)) thanh va huu tre.
• Adding a wildcard symbol may retrieve word variants: tu sach y nang o hoi. chieu thien hach ((luc va) or (tuc va)) thanh va huu tre*.