Perhaps you should try some spelling variations:
thien thanh » tien thanh, thi thanh, hien hanh
thien hach » hien hanh
huu them » huu thu, huu thuc, huu liem
hanh va » hang va, hanh vi
va hanh » van hanh, va thanh, va danh
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
ty nang » ky nang, ty xang, ty hang
xuc va » duc va, tuc va, luc va
nang o » nang co, nang ho, nang ro
va huu » vu huu
o hai » co hai, so hai, o lai

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 ty nang o hai. chieu ((thien hach) OR (thien thanh)) xuc va hanh va huu them~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty nang o hai. chieu ((thien hach) OR (thien thanh)) xuc va hanh va huu them".
• Adding a wildcard symbol may retrieve word variants: tu sach ty nang o hai. chieu ((thien hach) OR (thien thanh)) xuc va hanh va huu them*.