Perhaps you should try some spelling variations:
te sach » toc sach
hanh ve » hanh vi, hanh va, hanh kem
hanh de » hanh kem
luc van » luoc van, luu van, duc van
hau luc » hau loc, cau luc, nhan luc
cua tre » cua te, cuu tre, cua triet
hieu va » lieu va, hieu qua
va nang » van nang, da nang, cam nang
v nang » vu nang, van nang, voi nang
va hau » van hau, va chau, vat hau

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 ((v nang) or (va nang)) xa hoi. hieu va hau luc van ((hanh de) OR (hanh ve)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((v nang) OR (va nang)) xa hoi. hieu va hau luc van ((hanh de) OR (hanh ve)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((v nang) or (va nang)) xa hoi. hieu va hau luc van ((hanh de) OR (hanh ve)) cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach ((v nang) or (va nang)) xa hoi. hieu va hau luc van ((hanh de) OR (hanh ve)) cua tre*.