Perhaps you should try some spelling variations:
thien hach » thien thanh
hien hanh » dieu hanh
sach ty » sach y, sach tu, sach thu
hanh va » hang va, hanh vi
te sach » toc sach
ty nang » ky nang, ty xang, ty hang
nang ho » nang hoc, nang co, tang ho
huu tre » huu tri, cuu tre, huu them
ho hoi » hoc hoi, hoa hoi, hoi hoi
tuc va » thuc va, truc va, duc va
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 ty nang ho hoi. chieu ((thien hach) OR (hien hanh)) ((tuc va) or (tuc xa)) hanh va huu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty nang ho hoi. chieu ((thien hach) OR (hien hanh)) ((tuc va) OR (tuc xa)) hanh va huu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty nang ho hoi. chieu ((thien hach) OR (hien hanh)) ((tuc va) or (tuc xa)) hanh va huu tre".
• Adding a wildcard symbol may retrieve word variants: te sach ty nang ho hoi. chieu ((thien hach) OR (hien hanh)) ((tuc va) or (tuc xa)) hanh va huu tre*.