Perhaps you should try some spelling variations:
hieu van » hieu va, thien van
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va
lam tuc » lam thuoc, lam truoc, luat tuc
va tinh » may tinh
tinh vi » trinh vi, tinh voi, tinh va
cuu tre » cua tre, cau tren, cau treo
tuc va » thuc va, truc va, tuc xa
vi cuu » vi luu, vinh cuu

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 ky nang xa hoi. ((((hieu van) OR (hieu ve))) or (lieu va)) lam tuc va tinh vi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang xa hoi. ((((hieu van) OR (hieu ve))) OR (lieu va)) lam tuc va tinh vi cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang xa hoi. ((((hieu van) OR (hieu ve))) or (lieu va)) lam tuc va tinh vi cuu tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang xa hoi. ((((hieu van) OR (hieu ve))) or (lieu va)) lam tuc va tinh vi cuu tre*.