Perhaps you should try some spelling variations:
dieu hien » dieu khien, dieu kien, bieu hien
hanh xuc » hanh xu, hanh duoc, nhanh cuc
te sach » toc sach
sach ky » sac ky, sach y, sach ty
nang ro » nang co, nang ho, nang ra
tinh va » tich va, trinh van, trinh vat
huu tre » huu tri, cuu tre, huu them
nang o » nang co, nang ho, nang x
va huu » vu huu

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ky ((nang o) OR (nang ro)) hoi. dieu hien ((hanh xuc) or (hanh phuc)) may tinh va huu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky ((nang o) OR (nang ro)) hoi. dieu hien ((hanh xuc) OR (hanh phuc)) may tinh va huu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky ((nang o) OR (nang ro)) hoi. dieu hien ((hanh xuc) or (hanh phuc)) may tinh va huu tre".
• Adding a wildcard symbol may retrieve word variants: te sach ky ((nang o) OR (nang ro)) hoi. dieu hien ((hanh xuc) or (hanh phuc)) may tinh va huu tre*.